20128030405

素因数分解:

$5^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{89}}^1\times {\mathrm{263}}^1\times {\mathrm{311}}^1$

素因数の和:754

約数の個数: 64

約数和(自身を含む): 28466380800

約数和(自身を除く): 8338350395

約数列:

[1, 5, 7, 35, 79, 89, 263, 311, 395, 445, 553, 623, 1315, 1555, 1841, 2177, 2765, 3115, 7031, 9205, 10885, 20777, 23407, 24569, 27679, 35155, 49217, 81793, 103885, 117035, 122845, 138395, 145439, 163849, 171983, 193753, 246085, 408965, 572551, 727195, 819245, 859915, 968765, 1849153, 2186641, 2862755, 6461647, 7279577, 9245765, 10933205, 12944071, 15306487, 32308235, 36397885, 45231529, 50957039, 64720355, 76532435, 226157645, 254785195, 575086583, 2875432915, 4025606081, 20128030405]

約数ペア:

[(1, 20128030405), (5, 4025606081), (7, 2875432915), (35, 575086583), (79, 254785195), (89, 226157645), (263, 76532435), (311, 64720355), (395, 50957039), (445, 45231529), (553, 36397885), (623, 32308235), (1315, 15306487), (1555, 12944071), (1841, 10933205), (2177, 9245765), (2765, 7279577), (3115, 6461647), (7031, 2862755), (9205, 2186641), (10885, 1849153), (20777, 968765), (23407, 859915), (24569, 819245), (27679, 727195), (35155, 572551), (49217, 408965), (81793, 246085), (103885, 193753), (117035, 171983), (122845, 163849), (138395, 145439)]