21421280

素因数分解:

$2^5\times 5^1\times {\mathrm{23}}^1\times {\mathrm{5821}}^1$

素因数の和:5859

約数の個数: 48

約数和(自身を含む): 52817184

約数和(自身を除く): 31395904

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 32, 40, 46, 80, 92, 115, 160, 184, 230, 368, 460, 736, 920, 1840, 3680, 5821, 11642, 23284, 29105, 46568, 58210, 93136, 116420, 133883, 186272, 232840, 267766, 465680, 535532, 669415, 931360, 1071064, 1338830, 2142128, 2677660, 4284256, 5355320, 10710640, 21421280]

約数ペア:

[(1, 21421280), (2, 10710640), (4, 5355320), (5, 4284256), (8, 2677660), (10, 2142128), (16, 1338830), (20, 1071064), (23, 931360), (32, 669415), (40, 535532), (46, 465680), (80, 267766), (92, 232840), (115, 186272), (160, 133883), (184, 116420), (230, 93136), (368, 58210), (460, 46568), (736, 29105), (920, 23284), (1840, 11642), (3680, 5821)]