21904425

素因数分解:

$3^4\times 5^2\times {\mathrm{29}}^1\times {\mathrm{373}}^1$

素因数の和:424

約数の個数: 60

約数和(自身を含む): 42086220

約数和(自身を除く): 20181795

約数列:

[1, 3, 5, 9, 15, 25, 27, 29, 45, 75, 81, 87, 135, 145, 225, 261, 373, 405, 435, 675, 725, 783, 1119, 1305, 1865, 2025, 2175, 2349, 3357, 3915, 5595, 6525, 9325, 10071, 10817, 11745, 16785, 19575, 27975, 30213, 32451, 50355, 54085, 58725, 83925, 97353, 151065, 162255, 251775, 270425, 292059, 486765, 755325, 811275, 876177, 1460295, 2433825, 4380885, 7301475, 21904425]

約数ペア:

[(1, 21904425), (3, 7301475), (5, 4380885), (9, 2433825), (15, 1460295), (25, 876177), (27, 811275), (29, 755325), (45, 486765), (75, 292059), (81, 270425), (87, 251775), (135, 162255), (145, 151065), (225, 97353), (261, 83925), (373, 58725), (405, 54085), (435, 50355), (675, 32451), (725, 30213), (783, 27975), (1119, 19575), (1305, 16785), (1865, 11745), (2025, 10817), (2175, 10071), (2349, 9325), (3357, 6525), (3915, 5595)]