20553340

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{991}}^1$

素因数の和:1078

約数の個数: 48

約数和(自身を含む): 46497024

約数和(自身を除く): 25943684

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 61, 68, 85, 122, 170, 244, 305, 340, 610, 991, 1037, 1220, 1982, 2074, 3964, 4148, 4955, 5185, 9910, 10370, 16847, 19820, 20740, 33694, 60451, 67388, 84235, 120902, 168470, 241804, 302255, 336940, 604510, 1027667, 1209020, 2055334, 4110668, 5138335, 10276670, 20553340]

約数ペア:

[(1, 20553340), (2, 10276670), (4, 5138335), (5, 4110668), (10, 2055334), (17, 1209020), (20, 1027667), (34, 604510), (61, 336940), (68, 302255), (85, 241804), (122, 168470), (170, 120902), (244, 84235), (305, 67388), (340, 60451), (610, 33694), (991, 20740), (1037, 19820), (1220, 16847), (1982, 10370), (2074, 9910), (3964, 5185), (4148, 4955)]