18942620

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{79}}^1\times {\mathrm{631}}^1$

素因数の和:738

約数の個数: 48

約数和(自身を含む): 42470400

約数和(自身を除く): 23527780

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 79, 95, 158, 190, 316, 380, 395, 631, 790, 1262, 1501, 1580, 2524, 3002, 3155, 6004, 6310, 7505, 11989, 12620, 15010, 23978, 30020, 47956, 49849, 59945, 99698, 119890, 199396, 239780, 249245, 498490, 947131, 996980, 1894262, 3788524, 4735655, 9471310, 18942620]

約数ペア:

[(1, 18942620), (2, 9471310), (4, 4735655), (5, 3788524), (10, 1894262), (19, 996980), (20, 947131), (38, 498490), (76, 249245), (79, 239780), (95, 199396), (158, 119890), (190, 99698), (316, 59945), (380, 49849), (395, 47956), (631, 30020), (790, 23978), (1262, 15010), (1501, 12620), (1580, 11989), (2524, 7505), (3002, 6310), (3155, 6004)]