19807760

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{31}}^1\times {\mathrm{163}}^1$

素因数の和:221

約数の個数: 120

約数和(自身を含む): 55639296

約数和(自身を除く): 35831536

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 31, 35, 40, 49, 56, 62, 70, 80, 98, 112, 124, 140, 155, 163, 196, 217, 245, 248, 280, 310, 326, 392, 434, 490, 496, 560, 620, 652, 784, 815, 868, 980, 1085, 1141, 1240, 1304, 1519, 1630, 1736, 1960, 2170, 2282, 2480, 2608, 3038, 3260, 3472, 3920, 4340, 4564, 5053, 5705, 6076, 6520, 7595, 7987, 8680, 9128, 10106, 11410, 12152, 13040, 15190, 15974, 17360, 18256, 20212, 22820, 24304, 25265, 30380, 31948, 35371, 39935, 40424, 45640, 50530, 60760, 63896, 70742, 79870, 80848, 91280, 101060, 121520, 127792, 141484, 159740, 176855, 202120, 247597, 282968, 319480, 353710, 404240, 495194, 565936, 638960, 707420, 990388, 1237985, 1414840, 1980776, 2475970, 2829680, 3961552, 4951940, 9903880, 19807760]

約数ペア:

[(1, 19807760), (2, 9903880), (4, 4951940), (5, 3961552), (7, 2829680), (8, 2475970), (10, 1980776), (14, 1414840), (16, 1237985), (20, 990388), (28, 707420), (31, 638960), (35, 565936), (40, 495194), (49, 404240), (56, 353710), (62, 319480), (70, 282968), (80, 247597), (98, 202120), (112, 176855), (124, 159740), (140, 141484), (155, 127792), (163, 121520), (196, 101060), (217, 91280), (245, 80848), (248, 79870), (280, 70742), (310, 63896), (326, 60760), (392, 50530), (434, 45640), (490, 40424), (496, 39935), (560, 35371), (620, 31948), (652, 30380), (784, 25265), (815, 24304), (868, 22820), (980, 20212), (1085, 18256), (1141, 17360), (1240, 15974), (1304, 15190), (1519, 13040), (1630, 12152), (1736, 11410), (1960, 10106), (2170, 9128), (2282, 8680), (2480, 7987), (2608, 7595), (3038, 6520), (3260, 6076), (3472, 5705), (3920, 5053), (4340, 4564)]