81319360

素因数分解:

$2^6\times 5^1\times {\mathrm{199}}^1\times {\mathrm{1277}}^1$

素因数の和:1493

約数の個数: 56

約数和(自身を含む): 194767200

約数和(自身を除く): 113447840

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 199, 320, 398, 796, 995, 1277, 1592, 1990, 2554, 3184, 3980, 5108, 6368, 6385, 7960, 10216, 12736, 12770, 15920, 20432, 25540, 31840, 40864, 51080, 63680, 81728, 102160, 204320, 254123, 408640, 508246, 1016492, 1270615, 2032984, 2541230, 4065968, 5082460, 8131936, 10164920, 16263872, 20329840, 40659680, 81319360]

約数ペア:

[(1, 81319360), (2, 40659680), (4, 20329840), (5, 16263872), (8, 10164920), (10, 8131936), (16, 5082460), (20, 4065968), (32, 2541230), (40, 2032984), (64, 1270615), (80, 1016492), (160, 508246), (199, 408640), (320, 254123), (398, 204320), (796, 102160), (995, 81728), (1277, 63680), (1592, 51080), (1990, 40864), (2554, 31840), (3184, 25540), (3980, 20432), (5108, 15920), (6368, 12770), (6385, 12736), (7960, 10216)]