17820920

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{797}}^1$

素因数の和:864

約数の個数: 64

約数和(自身を含む): 44241120

約数和(自身を除く): 26420200

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 43, 52, 65, 86, 104, 130, 172, 215, 260, 344, 430, 520, 559, 797, 860, 1118, 1594, 1720, 2236, 2795, 3188, 3985, 4472, 5590, 6376, 7970, 10361, 11180, 15940, 20722, 22360, 31880, 34271, 41444, 51805, 68542, 82888, 103610, 137084, 171355, 207220, 274168, 342710, 414440, 445523, 685420, 891046, 1370840, 1782092, 2227615, 3564184, 4455230, 8910460, 17820920]

約数ペア:

[(1, 17820920), (2, 8910460), (4, 4455230), (5, 3564184), (8, 2227615), (10, 1782092), (13, 1370840), (20, 891046), (26, 685420), (40, 445523), (43, 414440), (52, 342710), (65, 274168), (86, 207220), (104, 171355), (130, 137084), (172, 103610), (215, 82888), (260, 68542), (344, 51805), (430, 41444), (520, 34271), (559, 31880), (797, 22360), (860, 20722), (1118, 15940), (1594, 11180), (1720, 10361), (2236, 7970), (2795, 6376), (3188, 5590), (3985, 4472)]