201818920

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{179}}^1\times {\mathrm{397}}^1$

素因数の和:658

約数の個数: 64

約数和(自身を含む): 464227200

約数和(自身を除く): 262408280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 179, 284, 355, 358, 397, 568, 710, 716, 794, 895, 1420, 1432, 1588, 1790, 1985, 2840, 3176, 3580, 3970, 7160, 7940, 12709, 15880, 25418, 28187, 50836, 56374, 63545, 71063, 101672, 112748, 127090, 140935, 142126, 225496, 254180, 281870, 284252, 355315, 508360, 563740, 568504, 710630, 1127480, 1421260, 2842520, 5045473, 10090946, 20181892, 25227365, 40363784, 50454730, 100909460, 201818920]

約数ペア:

[(1, 201818920), (2, 100909460), (4, 50454730), (5, 40363784), (8, 25227365), (10, 20181892), (20, 10090946), (40, 5045473), (71, 2842520), (142, 1421260), (179, 1127480), (284, 710630), (355, 568504), (358, 563740), (397, 508360), (568, 355315), (710, 284252), (716, 281870), (794, 254180), (895, 225496), (1420, 142126), (1432, 140935), (1588, 127090), (1790, 112748), (1985, 101672), (2840, 71063), (3176, 63545), (3580, 56374), (3970, 50836), (7160, 28187), (7940, 25418), (12709, 15880)]