640680

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{281}}^1$

素因数の和:314

約数の個数: 64

約数和(自身を含む): 2030400

約数和(自身を除く): 1389720

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 19, 20, 24, 30, 38, 40, 57, 60, 76, 95, 114, 120, 152, 190, 228, 281, 285, 380, 456, 562, 570, 760, 843, 1124, 1140, 1405, 1686, 2248, 2280, 2810, 3372, 4215, 5339, 5620, 6744, 8430, 10678, 11240, 16017, 16860, 21356, 26695, 32034, 33720, 42712, 53390, 64068, 80085, 106780, 128136, 160170, 213560, 320340, 640680]

約数ペア:

[(1, 640680), (2, 320340), (3, 213560), (4, 160170), (5, 128136), (6, 106780), (8, 80085), (10, 64068), (12, 53390), (15, 42712), (19, 33720), (20, 32034), (24, 26695), (30, 21356), (38, 16860), (40, 16017), (57, 11240), (60, 10678), (76, 8430), (95, 6744), (114, 5620), (120, 5339), (152, 4215), (190, 3372), (228, 2810), (281, 2280), (285, 2248), (380, 1686), (456, 1405), (562, 1140), (570, 1124), (760, 843)]