40320020

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{79}}^1\times {\mathrm{151}}^1$

素因数の和:265

約数の個数: 72

約数和(自身を含む): 93461760

約数和(自身を除く): 53141740

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 79, 130, 151, 158, 169, 260, 302, 316, 338, 395, 604, 676, 755, 790, 845, 1027, 1510, 1580, 1690, 1963, 2054, 3020, 3380, 3926, 4108, 5135, 7852, 9815, 10270, 11929, 13351, 19630, 20540, 23858, 25519, 26702, 39260, 47716, 51038, 53404, 59645, 66755, 102076, 119290, 127595, 133510, 155077, 238580, 255190, 267020, 310154, 510380, 620308, 775385, 1550770, 2016001, 3101540, 4032002, 8064004, 10080005, 20160010, 40320020]

約数ペア:

[(1, 40320020), (2, 20160010), (4, 10080005), (5, 8064004), (10, 4032002), (13, 3101540), (20, 2016001), (26, 1550770), (52, 775385), (65, 620308), (79, 510380), (130, 310154), (151, 267020), (158, 255190), (169, 238580), (260, 155077), (302, 133510), (316, 127595), (338, 119290), (395, 102076), (604, 66755), (676, 59645), (755, 53404), (790, 51038), (845, 47716), (1027, 39260), (1510, 26702), (1580, 25519), (1690, 23858), (1963, 20540), (2054, 19630), (3020, 13351), (3380, 11929), (3926, 10270), (4108, 9815), (5135, 7852)]