20315540

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{31}}^2\times {\mathrm{151}}^1$

素因数の和:229

約数の個数: 72

約数和(自身を含む): 50714496

約数和(自身を除く): 30398956

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 31, 35, 62, 70, 124, 140, 151, 155, 217, 302, 310, 434, 604, 620, 755, 868, 961, 1057, 1085, 1510, 1922, 2114, 2170, 3020, 3844, 4228, 4340, 4681, 4805, 5285, 6727, 9362, 9610, 10570, 13454, 18724, 19220, 21140, 23405, 26908, 32767, 33635, 46810, 65534, 67270, 93620, 131068, 134540, 145111, 163835, 290222, 327670, 580444, 655340, 725555, 1015777, 1451110, 2031554, 2902220, 4063108, 5078885, 10157770, 20315540]

約数ペア:

[(1, 20315540), (2, 10157770), (4, 5078885), (5, 4063108), (7, 2902220), (10, 2031554), (14, 1451110), (20, 1015777), (28, 725555), (31, 655340), (35, 580444), (62, 327670), (70, 290222), (124, 163835), (140, 145111), (151, 134540), (155, 131068), (217, 93620), (302, 67270), (310, 65534), (434, 46810), (604, 33635), (620, 32767), (755, 26908), (868, 23405), (961, 21140), (1057, 19220), (1085, 18724), (1510, 13454), (1922, 10570), (2114, 9610), (2170, 9362), (3020, 6727), (3844, 5285), (4228, 4805), (4340, 4681)]