21129160

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{179}}^1\times {\mathrm{227}}^1$

素因数の和:430

約数の個数: 64

約数和(自身を含む): 51710400

約数和(自身を除く): 30581240

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 179, 227, 260, 358, 454, 520, 716, 895, 908, 1135, 1432, 1790, 1816, 2270, 2327, 2951, 3580, 4540, 4654, 5902, 7160, 9080, 9308, 11635, 11804, 14755, 18616, 23270, 23608, 29510, 40633, 46540, 59020, 81266, 93080, 118040, 162532, 203165, 325064, 406330, 528229, 812660, 1056458, 1625320, 2112916, 2641145, 4225832, 5282290, 10564580, 21129160]

約数ペア:

[(1, 21129160), (2, 10564580), (4, 5282290), (5, 4225832), (8, 2641145), (10, 2112916), (13, 1625320), (20, 1056458), (26, 812660), (40, 528229), (52, 406330), (65, 325064), (104, 203165), (130, 162532), (179, 118040), (227, 93080), (260, 81266), (358, 59020), (454, 46540), (520, 40633), (716, 29510), (895, 23608), (908, 23270), (1135, 18616), (1432, 14755), (1790, 11804), (1816, 11635), (2270, 9308), (2327, 9080), (2951, 7160), (3580, 5902), (4540, 4654)]