15720920

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{379}}^1$

素因数の和:468

約数の個数: 64

約数和(自身を含む): 38167200

約数和(自身を除く): 22446280

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 61, 68, 85, 122, 136, 170, 244, 305, 340, 379, 488, 610, 680, 758, 1037, 1220, 1516, 1895, 2074, 2440, 3032, 3790, 4148, 5185, 6443, 7580, 8296, 10370, 12886, 15160, 20740, 23119, 25772, 32215, 41480, 46238, 51544, 64430, 92476, 115595, 128860, 184952, 231190, 257720, 393023, 462380, 786046, 924760, 1572092, 1965115, 3144184, 3930230, 7860460, 15720920]

約数ペア:

[(1, 15720920), (2, 7860460), (4, 3930230), (5, 3144184), (8, 1965115), (10, 1572092), (17, 924760), (20, 786046), (34, 462380), (40, 393023), (61, 257720), (68, 231190), (85, 184952), (122, 128860), (136, 115595), (170, 92476), (244, 64430), (305, 51544), (340, 46238), (379, 41480), (488, 32215), (610, 25772), (680, 23119), (758, 20740), (1037, 15160), (1220, 12886), (1516, 10370), (1895, 8296), (2074, 7580), (2440, 6443), (3032, 5185), (3790, 4148)]