21757040

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^2\times {\mathrm{283}}^1$

素因数の和:358

約数の個数: 60

約数和(自身を含む): 52454232

約数和(自身を除く): 30697192

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 283, 310, 496, 566, 620, 961, 1132, 1240, 1415, 1922, 2264, 2480, 2830, 3844, 4528, 4805, 5660, 7688, 8773, 9610, 11320, 15376, 17546, 19220, 22640, 35092, 38440, 43865, 70184, 76880, 87730, 140368, 175460, 271963, 350920, 543926, 701840, 1087852, 1359815, 2175704, 2719630, 4351408, 5439260, 10878520, 21757040]

約数ペア:

[(1, 21757040), (2, 10878520), (4, 5439260), (5, 4351408), (8, 2719630), (10, 2175704), (16, 1359815), (20, 1087852), (31, 701840), (40, 543926), (62, 350920), (80, 271963), (124, 175460), (155, 140368), (248, 87730), (283, 76880), (310, 70184), (496, 43865), (566, 38440), (620, 35092), (961, 22640), (1132, 19220), (1240, 17546), (1415, 15376), (1922, 11320), (2264, 9610), (2480, 8773), (2830, 7688), (3844, 5660), (4528, 4805)]