90720520

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{206183}}^1$

素因数の和:206205

約数の個数: 32

約数和(自身を含む): 222678720

約数和(自身を除く): 131958200

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 206183, 412366, 824732, 1030915, 1649464, 2061830, 2268013, 4123660, 4536026, 8247320, 9072052, 11340065, 18144104, 22680130, 45360260, 90720520]

約数ペア:

[(1, 90720520), (2, 45360260), (4, 22680130), (5, 18144104), (8, 11340065), (10, 9072052), (11, 8247320), (20, 4536026), (22, 4123660), (40, 2268013), (44, 2061830), (55, 1649464), (88, 1030915), (110, 824732), (220, 412366), (440, 206183)]