20408545240

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{109}}^1\times {\mathrm{246361}}^1$

素因数の和:246500

約数の個数: 64

約数和(自身を含む): 48779676000

約数和(自身を除く): 28371130760

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 109, 152, 190, 218, 380, 436, 545, 760, 872, 1090, 2071, 2180, 4142, 4360, 8284, 10355, 16568, 20710, 41420, 82840, 246361, 492722, 985444, 1231805, 1970888, 2463610, 4680859, 4927220, 9361718, 9854440, 18723436, 23404295, 26853349, 37446872, 46808590, 53706698, 93617180, 107413396, 134266745, 187234360, 214826792, 268533490, 510213631, 537066980, 1020427262, 1074133960, 2040854524, 2551068155, 4081709048, 5102136310, 10204272620, 20408545240]

約数ペア:

[(1, 20408545240), (2, 10204272620), (4, 5102136310), (5, 4081709048), (8, 2551068155), (10, 2040854524), (19, 1074133960), (20, 1020427262), (38, 537066980), (40, 510213631), (76, 268533490), (95, 214826792), (109, 187234360), (152, 134266745), (190, 107413396), (218, 93617180), (380, 53706698), (436, 46808590), (545, 37446872), (760, 26853349), (872, 23404295), (1090, 18723436), (2071, 9854440), (2180, 9361718), (4142, 4927220), (4360, 4680859), (8284, 2463610), (10355, 1970888), (16568, 1231805), (20710, 985444), (41420, 492722), (82840, 246361)]