81260820

素因数分解:

$2^2\times 3^4\times 5^1\times {\mathrm{103}}^1\times {\mathrm{487}}^1$

素因数の和:611

約数の個数: 120

約数和(自身を含む): 257921664

約数和(自身を除く): 176660844

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 45, 54, 60, 81, 90, 103, 108, 135, 162, 180, 206, 270, 309, 324, 405, 412, 487, 515, 540, 618, 810, 927, 974, 1030, 1236, 1461, 1545, 1620, 1854, 1948, 2060, 2435, 2781, 2922, 3090, 3708, 4383, 4635, 4870, 5562, 5844, 6180, 7305, 8343, 8766, 9270, 9740, 11124, 13149, 13905, 14610, 16686, 17532, 18540, 21915, 26298, 27810, 29220, 33372, 39447, 41715, 43830, 50161, 52596, 55620, 65745, 78894, 83430, 87660, 100322, 131490, 150483, 157788, 166860, 197235, 200644, 250805, 262980, 300966, 394470, 451449, 501610, 601932, 752415, 788940, 902898, 1003220, 1354347, 1504830, 1805796, 2257245, 2708694, 3009660, 4063041, 4514490, 5417388, 6771735, 8126082, 9028980, 13543470, 16252164, 20315205, 27086940, 40630410, 81260820]

約数ペア:

[(1, 81260820), (2, 40630410), (3, 27086940), (4, 20315205), (5, 16252164), (6, 13543470), (9, 9028980), (10, 8126082), (12, 6771735), (15, 5417388), (18, 4514490), (20, 4063041), (27, 3009660), (30, 2708694), (36, 2257245), (45, 1805796), (54, 1504830), (60, 1354347), (81, 1003220), (90, 902898), (103, 788940), (108, 752415), (135, 601932), (162, 501610), (180, 451449), (206, 394470), (270, 300966), (309, 262980), (324, 250805), (405, 200644), (412, 197235), (487, 166860), (515, 157788), (540, 150483), (618, 131490), (810, 100322), (927, 87660), (974, 83430), (1030, 78894), (1236, 65745), (1461, 55620), (1545, 52596), (1620, 50161), (1854, 43830), (1948, 41715), (2060, 39447), (2435, 33372), (2781, 29220), (2922, 27810), (3090, 26298), (3708, 21915), (4383, 18540), (4635, 17532), (4870, 16686), (5562, 14610), (5844, 13905), (6180, 13149), (7305, 11124), (8343, 9740), (8766, 9270)]