21000891260

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{487}}^1\times {\mathrm{1223}}^1$

素因数の和:1803

約数の個数: 96

約数和(自身を含む): 46360968192

約数和(自身を除く): 25360076932

約数列:

[1, 2, 4, 5, 10, 20, 41, 43, 82, 86, 164, 172, 205, 215, 410, 430, 487, 820, 860, 974, 1223, 1763, 1948, 2435, 2446, 3526, 4870, 4892, 6115, 7052, 8815, 9740, 12230, 17630, 19967, 20941, 24460, 35260, 39934, 41882, 50143, 52589, 79868, 83764, 99835, 100286, 104705, 105178, 199670, 200572, 209410, 210356, 250715, 262945, 399340, 418820, 501430, 525890, 595601, 858581, 1002860, 1051780, 1191202, 1717162, 2156149, 2382404, 2978005, 3434324, 4292905, 4312298, 5956010, 8585810, 8624596, 10780745, 11912020, 17171620, 21561490, 24419641, 25610843, 43122980, 48839282, 51221686, 97678564, 102443372, 122098205, 128054215, 244196410, 256108430, 488392820, 512216860, 1050044563, 2100089126, 4200178252, 5250222815, 10500445630, 21000891260]

約数ペア:

[(1, 21000891260), (2, 10500445630), (4, 5250222815), (5, 4200178252), (10, 2100089126), (20, 1050044563), (41, 512216860), (43, 488392820), (82, 256108430), (86, 244196410), (164, 128054215), (172, 122098205), (205, 102443372), (215, 97678564), (410, 51221686), (430, 48839282), (487, 43122980), (820, 25610843), (860, 24419641), (974, 21561490), (1223, 17171620), (1763, 11912020), (1948, 10780745), (2435, 8624596), (2446, 8585810), (3526, 5956010), (4870, 4312298), (4892, 4292905), (6115, 3434324), (7052, 2978005), (8815, 2382404), (9740, 2156149), (12230, 1717162), (17630, 1191202), (19967, 1051780), (20941, 1002860), (24460, 858581), (35260, 595601), (39934, 525890), (41882, 501430), (50143, 418820), (52589, 399340), (79868, 262945), (83764, 250715), (99835, 210356), (100286, 209410), (104705, 200572), (105178, 199670)]