21213280

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{709}}^1$

素因数の和:752

約数の個数: 96

約数和(自身を含む): 57970080

約数和(自身を除く): 36756800

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 17, 20, 22, 32, 34, 40, 44, 55, 68, 80, 85, 88, 110, 136, 160, 170, 176, 187, 220, 272, 340, 352, 374, 440, 544, 680, 709, 748, 880, 935, 1360, 1418, 1496, 1760, 1870, 2720, 2836, 2992, 3545, 3740, 5672, 5984, 7090, 7480, 7799, 11344, 12053, 14180, 14960, 15598, 22688, 24106, 28360, 29920, 31196, 38995, 48212, 56720, 60265, 62392, 77990, 96424, 113440, 120530, 124784, 132583, 155980, 192848, 241060, 249568, 265166, 311960, 385696, 482120, 530332, 623920, 662915, 964240, 1060664, 1247840, 1325830, 1928480, 2121328, 2651660, 4242656, 5303320, 10606640, 21213280]

約数ペア:

[(1, 21213280), (2, 10606640), (4, 5303320), (5, 4242656), (8, 2651660), (10, 2121328), (11, 1928480), (16, 1325830), (17, 1247840), (20, 1060664), (22, 964240), (32, 662915), (34, 623920), (40, 530332), (44, 482120), (55, 385696), (68, 311960), (80, 265166), (85, 249568), (88, 241060), (110, 192848), (136, 155980), (160, 132583), (170, 124784), (176, 120530), (187, 113440), (220, 96424), (272, 77990), (340, 62392), (352, 60265), (374, 56720), (440, 48212), (544, 38995), (680, 31196), (709, 29920), (748, 28360), (880, 24106), (935, 22688), (1360, 15598), (1418, 14960), (1496, 14180), (1760, 12053), (1870, 11344), (2720, 7799), (2836, 7480), (2992, 7090), (3545, 5984), (3740, 5672)]