20885020

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{37}}^1\times {\mathrm{167}}^1$

素因数の和:239

約数の個数: 72

約数和(自身を含む): 49067424

約数和(自身を除く): 28182404

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 37, 52, 65, 74, 130, 148, 167, 169, 185, 260, 334, 338, 370, 481, 668, 676, 740, 835, 845, 962, 1670, 1690, 1924, 2171, 2405, 3340, 3380, 4342, 4810, 6179, 6253, 8684, 9620, 10855, 12358, 12506, 21710, 24716, 25012, 28223, 30895, 31265, 43420, 56446, 61790, 62530, 80327, 112892, 123580, 125060, 141115, 160654, 282230, 321308, 401635, 564460, 803270, 1044251, 1606540, 2088502, 4177004, 5221255, 10442510, 20885020]

約数ペア:

[(1, 20885020), (2, 10442510), (4, 5221255), (5, 4177004), (10, 2088502), (13, 1606540), (20, 1044251), (26, 803270), (37, 564460), (52, 401635), (65, 321308), (74, 282230), (130, 160654), (148, 141115), (167, 125060), (169, 123580), (185, 112892), (260, 80327), (334, 62530), (338, 61790), (370, 56446), (481, 43420), (668, 31265), (676, 30895), (740, 28223), (835, 25012), (845, 24716), (962, 21710), (1670, 12506), (1690, 12358), (1924, 10855), (2171, 9620), (2405, 8684), (3340, 6253), (3380, 6179), (4342, 4810)]