20712640

素因数分解:

$2^6\times 5^1\times {\mathrm{13}}^2\times {\mathrm{383}}^1$

素因数の和:426

約数の個数: 84

約数和(自身を含む): 53547264

約数和(自身を除く): 32834624

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 130, 160, 169, 208, 260, 320, 338, 383, 416, 520, 676, 766, 832, 845, 1040, 1352, 1532, 1690, 1915, 2080, 2704, 3064, 3380, 3830, 4160, 4979, 5408, 6128, 6760, 7660, 9958, 10816, 12256, 13520, 15320, 19916, 24512, 24895, 27040, 30640, 39832, 49790, 54080, 61280, 64727, 79664, 99580, 122560, 129454, 159328, 199160, 258908, 318656, 323635, 398320, 517816, 647270, 796640, 1035632, 1294540, 1593280, 2071264, 2589080, 4142528, 5178160, 10356320, 20712640]

約数ペア:

[(1, 20712640), (2, 10356320), (4, 5178160), (5, 4142528), (8, 2589080), (10, 2071264), (13, 1593280), (16, 1294540), (20, 1035632), (26, 796640), (32, 647270), (40, 517816), (52, 398320), (64, 323635), (65, 318656), (80, 258908), (104, 199160), (130, 159328), (160, 129454), (169, 122560), (208, 99580), (260, 79664), (320, 64727), (338, 61280), (383, 54080), (416, 49790), (520, 39832), (676, 30640), (766, 27040), (832, 24895), (845, 24512), (1040, 19916), (1352, 15320), (1532, 13520), (1690, 12256), (1915, 10816), (2080, 9958), (2704, 7660), (3064, 6760), (3380, 6128), (3830, 5408), (4160, 4979)]