21142420

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{233}}^1\times {\mathrm{349}}^1$

素因数の和:604

約数の個数: 48

約数和(自身を含む): 48157200

約数和(自身を除く): 27014780

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 233, 260, 349, 466, 698, 932, 1165, 1396, 1745, 2330, 3029, 3490, 4537, 4660, 6058, 6980, 9074, 12116, 15145, 18148, 22685, 30290, 45370, 60580, 81317, 90740, 162634, 325268, 406585, 813170, 1057121, 1626340, 2114242, 4228484, 5285605, 10571210, 21142420]

約数ペア:

[(1, 21142420), (2, 10571210), (4, 5285605), (5, 4228484), (10, 2114242), (13, 1626340), (20, 1057121), (26, 813170), (52, 406585), (65, 325268), (130, 162634), (233, 90740), (260, 81317), (349, 60580), (466, 45370), (698, 30290), (932, 22685), (1165, 18148), (1396, 15145), (1745, 12116), (2330, 9074), (3029, 6980), (3490, 6058), (4537, 4660)]