21131748

素因数分解:

$2^2\times 3^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{73}}^1$

素因数の和:154

約数の個数: 144

約数和(自身を含む): 63999936

約数和(自身を除く): 42868188

約数列:

[1, 2, 3, 4, 6, 9, 11, 12, 17, 18, 22, 33, 34, 36, 43, 44, 51, 66, 68, 73, 86, 99, 102, 129, 132, 146, 153, 172, 187, 198, 204, 219, 258, 292, 306, 374, 387, 396, 438, 473, 516, 561, 612, 657, 731, 748, 774, 803, 876, 946, 1122, 1241, 1314, 1419, 1462, 1548, 1606, 1683, 1892, 2193, 2244, 2409, 2482, 2628, 2838, 2924, 3139, 3212, 3366, 3723, 4257, 4386, 4818, 4964, 5676, 6278, 6579, 6732, 7227, 7446, 8041, 8514, 8772, 9417, 9636, 11169, 12556, 13158, 13651, 14454, 14892, 16082, 17028, 18834, 22338, 24123, 26316, 27302, 28251, 28908, 32164, 34529, 37668, 40953, 44676, 48246, 53363, 54604, 56502, 69058, 72369, 81906, 96492, 103587, 106726, 113004, 122859, 138116, 144738, 160089, 163812, 207174, 213452, 245718, 289476, 310761, 320178, 414348, 480267, 491436, 586993, 621522, 640356, 960534, 1173986, 1243044, 1760979, 1921068, 2347972, 3521958, 5282937, 7043916, 10565874, 21131748]

約数ペア:

[(1, 21131748), (2, 10565874), (3, 7043916), (4, 5282937), (6, 3521958), (9, 2347972), (11, 1921068), (12, 1760979), (17, 1243044), (18, 1173986), (22, 960534), (33, 640356), (34, 621522), (36, 586993), (43, 491436), (44, 480267), (51, 414348), (66, 320178), (68, 310761), (73, 289476), (86, 245718), (99, 213452), (102, 207174), (129, 163812), (132, 160089), (146, 144738), (153, 138116), (172, 122859), (187, 113004), (198, 106726), (204, 103587), (219, 96492), (258, 81906), (292, 72369), (306, 69058), (374, 56502), (387, 54604), (396, 53363), (438, 48246), (473, 44676), (516, 40953), (561, 37668), (612, 34529), (657, 32164), (731, 28908), (748, 28251), (774, 27302), (803, 26316), (876, 24123), (946, 22338), (1122, 18834), (1241, 17028), (1314, 16082), (1419, 14892), (1462, 14454), (1548, 13651), (1606, 13158), (1683, 12556), (1892, 11169), (2193, 9636), (2244, 9417), (2409, 8772), (2482, 8514), (2628, 8041), (2838, 7446), (2924, 7227), (3139, 6732), (3212, 6579), (3366, 6278), (3723, 5676), (4257, 4964), (4386, 4818)]