21611920

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{599}}^1$

素因数の和:664

約数の個数: 80

約数和(自身を含む): 56246400

約数和(自身を除く): 34634480

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 41, 44, 55, 80, 82, 88, 110, 164, 176, 205, 220, 328, 410, 440, 451, 599, 656, 820, 880, 902, 1198, 1640, 1804, 2255, 2396, 2995, 3280, 3608, 4510, 4792, 5990, 6589, 7216, 9020, 9584, 11980, 13178, 18040, 23960, 24559, 26356, 32945, 36080, 47920, 49118, 52712, 65890, 98236, 105424, 122795, 131780, 196472, 245590, 263560, 270149, 392944, 491180, 527120, 540298, 982360, 1080596, 1350745, 1964720, 2161192, 2701490, 4322384, 5402980, 10805960, 21611920]

約数ペア:

[(1, 21611920), (2, 10805960), (4, 5402980), (5, 4322384), (8, 2701490), (10, 2161192), (11, 1964720), (16, 1350745), (20, 1080596), (22, 982360), (40, 540298), (41, 527120), (44, 491180), (55, 392944), (80, 270149), (82, 263560), (88, 245590), (110, 196472), (164, 131780), (176, 122795), (205, 105424), (220, 98236), (328, 65890), (410, 52712), (440, 49118), (451, 47920), (599, 36080), (656, 32945), (820, 26356), (880, 24559), (902, 23960), (1198, 18040), (1640, 13178), (1804, 11980), (2255, 9584), (2396, 9020), (2995, 7216), (3280, 6589), (3608, 5990), (4510, 4792)]