19892080

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{617}}^1$

素因数の和:674

約数の個数: 80

約数和(自身を含む): 51496704

約数和(自身を除く): 31604624

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 31, 40, 52, 62, 65, 80, 104, 124, 130, 155, 208, 248, 260, 310, 403, 496, 520, 617, 620, 806, 1040, 1234, 1240, 1612, 2015, 2468, 2480, 3085, 3224, 4030, 4936, 6170, 6448, 8021, 8060, 9872, 12340, 16042, 16120, 19127, 24680, 32084, 32240, 38254, 40105, 49360, 64168, 76508, 80210, 95635, 128336, 153016, 160420, 191270, 248651, 306032, 320840, 382540, 497302, 641680, 765080, 994604, 1243255, 1530160, 1989208, 2486510, 3978416, 4973020, 9946040, 19892080]

約数ペア:

[(1, 19892080), (2, 9946040), (4, 4973020), (5, 3978416), (8, 2486510), (10, 1989208), (13, 1530160), (16, 1243255), (20, 994604), (26, 765080), (31, 641680), (40, 497302), (52, 382540), (62, 320840), (65, 306032), (80, 248651), (104, 191270), (124, 160420), (130, 153016), (155, 128336), (208, 95635), (248, 80210), (260, 76508), (310, 64168), (403, 49360), (496, 40105), (520, 38254), (617, 32240), (620, 32084), (806, 24680), (1040, 19127), (1234, 16120), (1240, 16042), (1612, 12340), (2015, 9872), (2468, 8060), (2480, 8021), (3085, 6448), (3224, 6170), (4030, 4936)]