21797990

素因数分解:

$2^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{163}}^1\times {\mathrm{311}}^1$

素因数の和:524

約数の個数: 32

約数和(自身を含む): 40525056

約数和(自身を除く): 18727066

約数列:

[1, 2, 5, 10, 43, 86, 163, 215, 311, 326, 430, 622, 815, 1555, 1630, 3110, 7009, 13373, 14018, 26746, 35045, 50693, 66865, 70090, 101386, 133730, 253465, 506930, 2179799, 4359598, 10898995, 21797990]

約数ペア:

[(1, 21797990), (2, 10898995), (5, 4359598), (10, 2179799), (43, 506930), (86, 253465), (163, 133730), (215, 101386), (311, 70090), (326, 66865), (430, 50693), (622, 35045), (815, 26746), (1555, 14018), (1630, 13373), (3110, 7009)]