20019800

素因数分解:

$2^3\times 5^2\times {\mathrm{31}}^1\times {\mathrm{3229}}^1$

素因数の和:3276

約数の個数: 48

約数和(自身を含む): 48062400

約数和(自身を除く): 28042600

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 31, 40, 50, 62, 100, 124, 155, 200, 248, 310, 620, 775, 1240, 1550, 3100, 3229, 6200, 6458, 12916, 16145, 25832, 32290, 64580, 80725, 100099, 129160, 161450, 200198, 322900, 400396, 500495, 645800, 800792, 1000990, 2001980, 2502475, 4003960, 5004950, 10009900, 20019800]

約数ペア:

[(1, 20019800), (2, 10009900), (4, 5004950), (5, 4003960), (8, 2502475), (10, 2001980), (20, 1000990), (25, 800792), (31, 645800), (40, 500495), (50, 400396), (62, 322900), (100, 200198), (124, 161450), (155, 129160), (200, 100099), (248, 80725), (310, 64580), (620, 32290), (775, 25832), (1240, 16145), (1550, 12916), (3100, 6458), (3229, 6200)]