81009740

素因数分解:

$2^2\times 5^1\times 7^5\times {\mathrm{241}}^1$

素因数の和:285

約数の個数: 72

約数和(自身を含む): 199295712

約数和(自身を除く): 118285972

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 241, 245, 343, 482, 490, 686, 964, 980, 1205, 1372, 1687, 1715, 2401, 2410, 3374, 3430, 4802, 4820, 6748, 6860, 8435, 9604, 11809, 12005, 16807, 16870, 23618, 24010, 33614, 33740, 47236, 48020, 59045, 67228, 82663, 84035, 118090, 165326, 168070, 236180, 330652, 336140, 413315, 578641, 826630, 1157282, 1653260, 2314564, 2893205, 4050487, 5786410, 8100974, 11572820, 16201948, 20252435, 40504870, 81009740]

約数ペア:

[(1, 81009740), (2, 40504870), (4, 20252435), (5, 16201948), (7, 11572820), (10, 8100974), (14, 5786410), (20, 4050487), (28, 2893205), (35, 2314564), (49, 1653260), (70, 1157282), (98, 826630), (140, 578641), (196, 413315), (241, 336140), (245, 330652), (343, 236180), (482, 168070), (490, 165326), (686, 118090), (964, 84035), (980, 82663), (1205, 67228), (1372, 59045), (1687, 48020), (1715, 47236), (2401, 33740), (2410, 33614), (3374, 24010), (3430, 23618), (4802, 16870), (4820, 16807), (6748, 12005), (6860, 11809), (8435, 9604)]