20418530

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{179}}^1$

素因数の和:275

約数の個数: 64

約数和(自身を含む): 43390080

約数和(自身を除く): 22971550

約数列:

[1, 2, 5, 10, 11, 17, 22, 34, 55, 61, 85, 110, 122, 170, 179, 187, 305, 358, 374, 610, 671, 895, 935, 1037, 1342, 1790, 1870, 1969, 2074, 3043, 3355, 3938, 5185, 6086, 6710, 9845, 10370, 10919, 11407, 15215, 19690, 21838, 22814, 30430, 33473, 54595, 57035, 66946, 109190, 114070, 120109, 167365, 185623, 240218, 334730, 371246, 600545, 928115, 1201090, 1856230, 2041853, 4083706, 10209265, 20418530]

約数ペア:

[(1, 20418530), (2, 10209265), (5, 4083706), (10, 2041853), (11, 1856230), (17, 1201090), (22, 928115), (34, 600545), (55, 371246), (61, 334730), (85, 240218), (110, 185623), (122, 167365), (170, 120109), (179, 114070), (187, 109190), (305, 66946), (358, 57035), (374, 54595), (610, 33473), (671, 30430), (895, 22814), (935, 21838), (1037, 19690), (1342, 15215), (1790, 11407), (1870, 10919), (1969, 10370), (2074, 9845), (3043, 6710), (3355, 6086), (3938, 5185)]