21000251988

素因数分解:

$2^2\times 3^2\times {\mathrm{41}}^1\times {\mathrm{3067}}^1\times {\mathrm{4639}}^1$

素因数の和:7757

約数の個数: 72

約数和(自身を含む): 54408157440

約数和(自身を除く): 33407905452

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 41, 82, 123, 164, 246, 369, 492, 738, 1476, 3067, 4639, 6134, 9201, 9278, 12268, 13917, 18402, 18556, 27603, 27834, 36804, 41751, 55206, 55668, 83502, 110412, 125747, 167004, 190199, 251494, 377241, 380398, 502988, 570597, 754482, 760796, 1131723, 1141194, 1508964, 1711791, 2263446, 2282388, 3423582, 4526892, 6847164, 14227813, 28455626, 42683439, 56911252, 85366878, 128050317, 170733756, 256100634, 512201268, 583340333, 1166680666, 1750020999, 2333361332, 3500041998, 5250062997, 7000083996, 10500125994, 21000251988]

約数ペア:

[(1, 21000251988), (2, 10500125994), (3, 7000083996), (4, 5250062997), (6, 3500041998), (9, 2333361332), (12, 1750020999), (18, 1166680666), (36, 583340333), (41, 512201268), (82, 256100634), (123, 170733756), (164, 128050317), (246, 85366878), (369, 56911252), (492, 42683439), (738, 28455626), (1476, 14227813), (3067, 6847164), (4639, 4526892), (6134, 3423582), (9201, 2282388), (9278, 2263446), (12268, 1711791), (13917, 1508964), (18402, 1141194), (18556, 1131723), (27603, 760796), (27834, 754482), (36804, 570597), (41751, 502988), (55206, 380398), (55668, 377241), (83502, 251494), (110412, 190199), (125747, 167004)]