320438620

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{113}}^1\times {\mathrm{1997}}^1$

素因数の和:2190

約数の個数: 48

約数和(自身を含む): 688782528

約数和(自身を除く): 368343908

約数列:

[1, 2, 4, 5, 10, 20, 71, 113, 142, 226, 284, 355, 452, 565, 710, 1130, 1420, 1997, 2260, 3994, 7988, 8023, 9985, 16046, 19970, 32092, 39940, 40115, 80230, 141787, 160460, 225661, 283574, 451322, 567148, 708935, 902644, 1128305, 1417870, 2256610, 2835740, 4513220, 16021931, 32043862, 64087724, 80109655, 160219310, 320438620]

約数ペア:

[(1, 320438620), (2, 160219310), (4, 80109655), (5, 64087724), (10, 32043862), (20, 16021931), (71, 4513220), (113, 2835740), (142, 2256610), (226, 1417870), (284, 1128305), (355, 902644), (452, 708935), (565, 567148), (710, 451322), (1130, 283574), (1420, 225661), (1997, 160460), (2260, 141787), (3994, 80230), (7988, 40115), (8023, 39940), (9985, 32092), (16046, 19970)]