639400000

素因数分解:

$2^6\times 5^5\times {\mathrm{23}}^1\times {\mathrm{139}}^1$

素因数の和:199

約数の個数: 168

約数和(自身を含む): 1666768320

約数和(自身を除く): 1027368320

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 25, 32, 40, 46, 50, 64, 80, 92, 100, 115, 125, 139, 160, 184, 200, 230, 250, 278, 320, 368, 400, 460, 500, 556, 575, 625, 695, 736, 800, 920, 1000, 1112, 1150, 1250, 1390, 1472, 1600, 1840, 2000, 2224, 2300, 2500, 2780, 2875, 3125, 3197, 3475, 3680, 4000, 4448, 4600, 5000, 5560, 5750, 6250, 6394, 6950, 7360, 8000, 8896, 9200, 10000, 11120, 11500, 12500, 12788, 13900, 14375, 15985, 17375, 18400, 20000, 22240, 23000, 25000, 25576, 27800, 28750, 31970, 34750, 36800, 40000, 44480, 46000, 50000, 51152, 55600, 57500, 63940, 69500, 71875, 79925, 86875, 92000, 100000, 102304, 111200, 115000, 127880, 139000, 143750, 159850, 173750, 184000, 200000, 204608, 222400, 230000, 255760, 278000, 287500, 319700, 347500, 399625, 434375, 460000, 511520, 556000, 575000, 639400, 695000, 799250, 868750, 920000, 1023040, 1112000, 1150000, 1278800, 1390000, 1598500, 1737500, 1998125, 2300000, 2557600, 2780000, 3197000, 3475000, 3996250, 4600000, 5115200, 5560000, 6394000, 6950000, 7992500, 9990625, 12788000, 13900000, 15985000, 19981250, 25576000, 27800000, 31970000, 39962500, 63940000, 79925000, 127880000, 159850000, 319700000, 639400000]

約数ペア:

[(1, 639400000), (2, 319700000), (4, 159850000), (5, 127880000), (8, 79925000), (10, 63940000), (16, 39962500), (20, 31970000), (23, 27800000), (25, 25576000), (32, 19981250), (40, 15985000), (46, 13900000), (50, 12788000), (64, 9990625), (80, 7992500), (92, 6950000), (100, 6394000), (115, 5560000), (125, 5115200), (139, 4600000), (160, 3996250), (184, 3475000), (200, 3197000), (230, 2780000), (250, 2557600), (278, 2300000), (320, 1998125), (368, 1737500), (400, 1598500), (460, 1390000), (500, 1278800), (556, 1150000), (575, 1112000), (625, 1023040), (695, 920000), (736, 868750), (800, 799250), (920, 695000), (1000, 639400), (1112, 575000), (1150, 556000), (1250, 511520), (1390, 460000), (1472, 434375), (1600, 399625), (1840, 347500), (2000, 319700), (2224, 287500), (2300, 278000), (2500, 255760), (2780, 230000), (2875, 222400), (3125, 204608), (3197, 200000), (3475, 184000), (3680, 173750), (4000, 159850), (4448, 143750), (4600, 139000), (5000, 127880), (5560, 115000), (5750, 111200), (6250, 102304), (6394, 100000), (6950, 92000), (7360, 86875), (8000, 79925), (8896, 71875), (9200, 69500), (10000, 63940), (11120, 57500), (11500, 55600), (12500, 51152), (12788, 50000), (13900, 46000), (14375, 44480), (15985, 40000), (17375, 36800), (18400, 34750), (20000, 31970), (22240, 28750), (23000, 27800), (25000, 25576)]