2001980

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{3229}}^1$

素因数の和:3269

約数の個数: 24

約数和(自身を含む): 4341120

約数和(自身を除く): 2339140

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 3229, 6458, 12916, 16145, 32290, 64580, 100099, 200198, 400396, 500495, 1000990, 2001980]

約数ペア:

[(1, 2001980), (2, 1000990), (4, 500495), (5, 400396), (10, 200198), (20, 100099), (31, 64580), (62, 32290), (124, 16145), (155, 12916), (310, 6458), (620, 3229)]