18960280

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{557}}^1$

素因数の和:628

約数の個数: 64

約数和(自身を含む): 45800640

約数和(自身を除く): 26840360

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 37, 40, 46, 74, 92, 115, 148, 184, 185, 230, 296, 370, 460, 557, 740, 851, 920, 1114, 1480, 1702, 2228, 2785, 3404, 4255, 4456, 5570, 6808, 8510, 11140, 12811, 17020, 20609, 22280, 25622, 34040, 41218, 51244, 64055, 82436, 102488, 103045, 128110, 164872, 206090, 256220, 412180, 474007, 512440, 824360, 948014, 1896028, 2370035, 3792056, 4740070, 9480140, 18960280]

約数ペア:

[(1, 18960280), (2, 9480140), (4, 4740070), (5, 3792056), (8, 2370035), (10, 1896028), (20, 948014), (23, 824360), (37, 512440), (40, 474007), (46, 412180), (74, 256220), (92, 206090), (115, 164872), (148, 128110), (184, 103045), (185, 102488), (230, 82436), (296, 64055), (370, 51244), (460, 41218), (557, 34040), (740, 25622), (851, 22280), (920, 20609), (1114, 17020), (1480, 12811), (1702, 11140), (2228, 8510), (2785, 6808), (3404, 5570), (4255, 4456)]