21215920

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{24109}}^1$

素因数の和:24133

約数の個数: 40

約数和(自身を含む): 53813520

約数和(自身を除く): 32597600

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 440, 880, 24109, 48218, 96436, 120545, 192872, 241090, 265199, 385744, 482180, 530398, 964360, 1060796, 1325995, 1928720, 2121592, 2651990, 4243184, 5303980, 10607960, 21215920]

約数ペア:

[(1, 21215920), (2, 10607960), (4, 5303980), (5, 4243184), (8, 2651990), (10, 2121592), (11, 1928720), (16, 1325995), (20, 1060796), (22, 964360), (40, 530398), (44, 482180), (55, 385744), (80, 265199), (88, 241090), (110, 192872), (176, 120545), (220, 96436), (440, 48218), (880, 24109)]