21670240

素因数分解:

$2^5\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{257}}^1$

素因数の和:320

約数の個数: 96

約数和(自身を含む): 56173824

約数和(自身を除く): 34503584

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 31, 32, 34, 40, 62, 68, 80, 85, 124, 136, 155, 160, 170, 248, 257, 272, 310, 340, 496, 514, 527, 544, 620, 680, 992, 1028, 1054, 1240, 1285, 1360, 2056, 2108, 2480, 2570, 2635, 2720, 4112, 4216, 4369, 4960, 5140, 5270, 7967, 8224, 8432, 8738, 10280, 10540, 15934, 16864, 17476, 20560, 21080, 21845, 31868, 34952, 39835, 41120, 42160, 43690, 63736, 69904, 79670, 84320, 87380, 127472, 135439, 139808, 159340, 174760, 254944, 270878, 318680, 349520, 541756, 637360, 677195, 699040, 1083512, 1274720, 1354390, 2167024, 2708780, 4334048, 5417560, 10835120, 21670240]

約数ペア:

[(1, 21670240), (2, 10835120), (4, 5417560), (5, 4334048), (8, 2708780), (10, 2167024), (16, 1354390), (17, 1274720), (20, 1083512), (31, 699040), (32, 677195), (34, 637360), (40, 541756), (62, 349520), (68, 318680), (80, 270878), (85, 254944), (124, 174760), (136, 159340), (155, 139808), (160, 135439), (170, 127472), (248, 87380), (257, 84320), (272, 79670), (310, 69904), (340, 63736), (496, 43690), (514, 42160), (527, 41120), (544, 39835), (620, 34952), (680, 31868), (992, 21845), (1028, 21080), (1054, 20560), (1240, 17476), (1285, 16864), (1360, 15934), (2056, 10540), (2108, 10280), (2480, 8738), (2570, 8432), (2635, 8224), (2720, 7967), (4112, 5270), (4216, 5140), (4369, 4960)]