20991770

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{67}}^1\times {\mathrm{97}}^1$

素因数の和:207

約数の個数: 64

約数和(自身を含む): 43182720

約数和(自身を除く): 22190950

約数列:

[1, 2, 5, 10, 17, 19, 34, 38, 67, 85, 95, 97, 134, 170, 190, 194, 323, 335, 485, 646, 670, 970, 1139, 1273, 1615, 1649, 1843, 2278, 2546, 3230, 3298, 3686, 5695, 6365, 6499, 8245, 9215, 11390, 12730, 12998, 16490, 18430, 21641, 31331, 32495, 43282, 62662, 64990, 108205, 110483, 123481, 156655, 216410, 220966, 246962, 313310, 552415, 617405, 1104830, 1234810, 2099177, 4198354, 10495885, 20991770]

約数ペア:

[(1, 20991770), (2, 10495885), (5, 4198354), (10, 2099177), (17, 1234810), (19, 1104830), (34, 617405), (38, 552415), (67, 313310), (85, 246962), (95, 220966), (97, 216410), (134, 156655), (170, 123481), (190, 110483), (194, 108205), (323, 64990), (335, 62662), (485, 43282), (646, 32495), (670, 31331), (970, 21641), (1139, 18430), (1273, 16490), (1615, 12998), (1649, 12730), (1843, 11390), (2278, 9215), (2546, 8245), (3230, 6499), (3298, 6365), (3686, 5695)]