18832040

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{349}}^1$

素因数の和:450

約数の個数: 64

約数和(自身を含む): 45360000

約数和(自身を除く): 26527960

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 71, 76, 95, 142, 152, 190, 284, 349, 355, 380, 568, 698, 710, 760, 1349, 1396, 1420, 1745, 2698, 2792, 2840, 3490, 5396, 6631, 6745, 6980, 10792, 13262, 13490, 13960, 24779, 26524, 26980, 33155, 49558, 53048, 53960, 66310, 99116, 123895, 132620, 198232, 247790, 265240, 470801, 495580, 941602, 991160, 1883204, 2354005, 3766408, 4708010, 9416020, 18832040]

約数ペア:

[(1, 18832040), (2, 9416020), (4, 4708010), (5, 3766408), (8, 2354005), (10, 1883204), (19, 991160), (20, 941602), (38, 495580), (40, 470801), (71, 265240), (76, 247790), (95, 198232), (142, 132620), (152, 123895), (190, 99116), (284, 66310), (349, 53960), (355, 53048), (380, 49558), (568, 33155), (698, 26980), (710, 26524), (760, 24779), (1349, 13960), (1396, 13490), (1420, 13262), (1745, 10792), (2698, 6980), (2792, 6745), (2840, 6631), (3490, 5396)]