21175540

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{1021}}^1$

素因数の和:1108

約数の個数: 48

約数和(自身を含む): 47903184

約数和(自身を除く): 26727644

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 61, 68, 85, 122, 170, 244, 305, 340, 610, 1021, 1037, 1220, 2042, 2074, 4084, 4148, 5105, 5185, 10210, 10370, 17357, 20420, 20740, 34714, 62281, 69428, 86785, 124562, 173570, 249124, 311405, 347140, 622810, 1058777, 1245620, 2117554, 4235108, 5293885, 10587770, 21175540]

約数ペア:

[(1, 21175540), (2, 10587770), (4, 5293885), (5, 4235108), (10, 2117554), (17, 1245620), (20, 1058777), (34, 622810), (61, 347140), (68, 311405), (85, 249124), (122, 173570), (170, 124562), (244, 86785), (305, 69428), (340, 62281), (610, 34714), (1021, 20740), (1037, 20420), (1220, 17357), (2042, 10370), (2074, 10210), (4084, 5185), (4148, 5105)]