1639280

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{661}}^1$

素因数の和:705

約数の個数: 40

約数和(自身を含む): 3940224

約数和(自身を除く): 2300944

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 661, 1240, 1322, 2480, 2644, 3305, 5288, 6610, 10576, 13220, 20491, 26440, 40982, 52880, 81964, 102455, 163928, 204910, 327856, 409820, 819640, 1639280]

約数ペア:

[(1, 1639280), (2, 819640), (4, 409820), (5, 327856), (8, 204910), (10, 163928), (16, 102455), (20, 81964), (31, 52880), (40, 40982), (62, 26440), (80, 20491), (124, 13220), (155, 10576), (248, 6610), (310, 5288), (496, 3305), (620, 2644), (661, 2480), (1240, 1322)]