20580880

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{409}}^1$

素因数の和:476

約数の個数: 80

約数和(自身を含む): 52161840

約数和(自身を除く): 31580960

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 37, 40, 68, 74, 80, 85, 136, 148, 170, 185, 272, 296, 340, 370, 409, 592, 629, 680, 740, 818, 1258, 1360, 1480, 1636, 2045, 2516, 2960, 3145, 3272, 4090, 5032, 6290, 6544, 6953, 8180, 10064, 12580, 13906, 15133, 16360, 25160, 27812, 30266, 32720, 34765, 50320, 55624, 60532, 69530, 75665, 111248, 121064, 139060, 151330, 242128, 257261, 278120, 302660, 514522, 556240, 605320, 1029044, 1210640, 1286305, 2058088, 2572610, 4116176, 5145220, 10290440, 20580880]

約数ペア:

[(1, 20580880), (2, 10290440), (4, 5145220), (5, 4116176), (8, 2572610), (10, 2058088), (16, 1286305), (17, 1210640), (20, 1029044), (34, 605320), (37, 556240), (40, 514522), (68, 302660), (74, 278120), (80, 257261), (85, 242128), (136, 151330), (148, 139060), (170, 121064), (185, 111248), (272, 75665), (296, 69530), (340, 60532), (370, 55624), (409, 50320), (592, 34765), (629, 32720), (680, 30266), (740, 27812), (818, 25160), (1258, 16360), (1360, 15133), (1480, 13906), (1636, 12580), (2045, 10064), (2516, 8180), (2960, 6953), (3145, 6544), (3272, 6290), (4090, 5032)]