661540

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{97}}^1$

素因数の和:148

約数の個数: 48

約数和(自身を含む): 1580544

約数和(自身を除く): 919004

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 31, 44, 55, 62, 97, 110, 124, 155, 194, 220, 310, 341, 388, 485, 620, 682, 970, 1067, 1364, 1705, 1940, 2134, 3007, 3410, 4268, 5335, 6014, 6820, 10670, 12028, 15035, 21340, 30070, 33077, 60140, 66154, 132308, 165385, 330770, 661540]

約数ペア:

[(1, 661540), (2, 330770), (4, 165385), (5, 132308), (10, 66154), (11, 60140), (20, 33077), (22, 30070), (31, 21340), (44, 15035), (55, 12028), (62, 10670), (97, 6820), (110, 6014), (124, 5335), (155, 4268), (194, 3410), (220, 3007), (310, 2134), (341, 1940), (388, 1705), (485, 1364), (620, 1067), (682, 970)]