20780500

素因数分解:

$2^2\times 5^3\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{139}}^1$

素因数の和:194

約数の個数: 96

約数和(自身を含む): 51367680

約数和(自身を除く): 30587180

約数列:

[1, 2, 4, 5, 10, 13, 20, 23, 25, 26, 46, 50, 52, 65, 92, 100, 115, 125, 130, 139, 230, 250, 260, 278, 299, 325, 460, 500, 556, 575, 598, 650, 695, 1150, 1196, 1300, 1390, 1495, 1625, 1807, 2300, 2780, 2875, 2990, 3197, 3250, 3475, 3614, 5750, 5980, 6394, 6500, 6950, 7228, 7475, 9035, 11500, 12788, 13900, 14950, 15985, 17375, 18070, 29900, 31970, 34750, 36140, 37375, 41561, 45175, 63940, 69500, 74750, 79925, 83122, 90350, 149500, 159850, 166244, 180700, 207805, 225875, 319700, 399625, 415610, 451750, 799250, 831220, 903500, 1039025, 1598500, 2078050, 4156100, 5195125, 10390250, 20780500]

約数ペア:

[(1, 20780500), (2, 10390250), (4, 5195125), (5, 4156100), (10, 2078050), (13, 1598500), (20, 1039025), (23, 903500), (25, 831220), (26, 799250), (46, 451750), (50, 415610), (52, 399625), (65, 319700), (92, 225875), (100, 207805), (115, 180700), (125, 166244), (130, 159850), (139, 149500), (230, 90350), (250, 83122), (260, 79925), (278, 74750), (299, 69500), (325, 63940), (460, 45175), (500, 41561), (556, 37375), (575, 36140), (598, 34750), (650, 31970), (695, 29900), (1150, 18070), (1196, 17375), (1300, 15985), (1390, 14950), (1495, 13900), (1625, 12788), (1807, 11500), (2300, 9035), (2780, 7475), (2875, 7228), (2990, 6950), (3197, 6500), (3250, 6394), (3475, 5980), (3614, 5750)]