20000860

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{229}}^1\times {\mathrm{397}}^1$

素因数の和:646

約数の個数: 48

約数和(自身を含む): 46136160

約数和(自身を除く): 26135300

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 229, 397, 458, 794, 916, 1145, 1588, 1985, 2290, 2519, 3970, 4367, 4580, 5038, 7940, 8734, 10076, 12595, 17468, 21835, 25190, 43670, 50380, 87340, 90913, 181826, 363652, 454565, 909130, 1000043, 1818260, 2000086, 4000172, 5000215, 10000430, 20000860]

約数ペア:

[(1, 20000860), (2, 10000430), (4, 5000215), (5, 4000172), (10, 2000086), (11, 1818260), (20, 1000043), (22, 909130), (44, 454565), (55, 363652), (110, 181826), (220, 90913), (229, 87340), (397, 50380), (458, 43670), (794, 25190), (916, 21835), (1145, 17468), (1588, 12595), (1985, 10076), (2290, 8734), (2519, 7940), (3970, 5038), (4367, 4580)]