18718960

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{439}}^1$

素因数の和:506

約数の個数: 80

約数和(自身を含む): 48121920

約数和(自身を除く): 29402960

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 41, 52, 65, 80, 82, 104, 130, 164, 205, 208, 260, 328, 410, 439, 520, 533, 656, 820, 878, 1040, 1066, 1640, 1756, 2132, 2195, 2665, 3280, 3512, 4264, 4390, 5330, 5707, 7024, 8528, 8780, 10660, 11414, 17560, 17999, 21320, 22828, 28535, 35120, 35998, 42640, 45656, 57070, 71996, 89995, 91312, 114140, 143992, 179990, 228280, 233987, 287984, 359980, 456560, 467974, 719960, 935948, 1169935, 1439920, 1871896, 2339870, 3743792, 4679740, 9359480, 18718960]

約数ペア:

[(1, 18718960), (2, 9359480), (4, 4679740), (5, 3743792), (8, 2339870), (10, 1871896), (13, 1439920), (16, 1169935), (20, 935948), (26, 719960), (40, 467974), (41, 456560), (52, 359980), (65, 287984), (80, 233987), (82, 228280), (104, 179990), (130, 143992), (164, 114140), (205, 91312), (208, 89995), (260, 71996), (328, 57070), (410, 45656), (439, 42640), (520, 35998), (533, 35120), (656, 28535), (820, 22828), (878, 21320), (1040, 17999), (1066, 17560), (1640, 11414), (1756, 10660), (2132, 8780), (2195, 8528), (2665, 7024), (3280, 5707), (3512, 5330), (4264, 4390)]