19955540

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{1487}}^1$

素因数の和:1568

約数の個数: 48

約数和(自身を含む): 46497024

約数和(自身を除く): 26541484

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 61, 110, 122, 220, 244, 305, 610, 671, 1220, 1342, 1487, 2684, 2974, 3355, 5948, 6710, 7435, 13420, 14870, 16357, 29740, 32714, 65428, 81785, 90707, 163570, 181414, 327140, 362828, 453535, 907070, 997777, 1814140, 1995554, 3991108, 4988885, 9977770, 19955540]

約数ペア:

[(1, 19955540), (2, 9977770), (4, 4988885), (5, 3991108), (10, 1995554), (11, 1814140), (20, 997777), (22, 907070), (44, 453535), (55, 362828), (61, 327140), (110, 181414), (122, 163570), (220, 90707), (244, 81785), (305, 65428), (610, 32714), (671, 29740), (1220, 16357), (1342, 14870), (1487, 13420), (2684, 7435), (2974, 6710), (3355, 5948)]