21360880

素因数分解:

$2^4\times 5^1\times {\mathrm{83}}^1\times {\mathrm{3217}}^1$

素因数の和:3313

約数の個数: 40

約数和(自身を含む): 50278032

約数和(自身を除く): 28917152

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 83, 166, 332, 415, 664, 830, 1328, 1660, 3217, 3320, 6434, 6640, 12868, 16085, 25736, 32170, 51472, 64340, 128680, 257360, 267011, 534022, 1068044, 1335055, 2136088, 2670110, 4272176, 5340220, 10680440, 21360880]

約数ペア:

[(1, 21360880), (2, 10680440), (4, 5340220), (5, 4272176), (8, 2670110), (10, 2136088), (16, 1335055), (20, 1068044), (40, 534022), (80, 267011), (83, 257360), (166, 128680), (332, 64340), (415, 51472), (664, 32170), (830, 25736), (1328, 16085), (1660, 12868), (3217, 6640), (3320, 6434)]