21551880

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{25657}}^1$

素因数の和:25678

約数の個数: 64

約数和(自身を含む): 73895040

約数和(自身を除く): 52343160

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840, 25657, 51314, 76971, 102628, 128285, 153942, 179599, 205256, 256570, 307884, 359198, 384855, 513140, 538797, 615768, 718396, 769710, 897995, 1026280, 1077594, 1436792, 1539420, 1795990, 2155188, 2693985, 3078840, 3591980, 4310376, 5387970, 7183960, 10775940, 21551880]

約数ペア:

[(1, 21551880), (2, 10775940), (3, 7183960), (4, 5387970), (5, 4310376), (6, 3591980), (7, 3078840), (8, 2693985), (10, 2155188), (12, 1795990), (14, 1539420), (15, 1436792), (20, 1077594), (21, 1026280), (24, 897995), (28, 769710), (30, 718396), (35, 615768), (40, 538797), (42, 513140), (56, 384855), (60, 359198), (70, 307884), (84, 256570), (105, 205256), (120, 179599), (140, 153942), (168, 128285), (210, 102628), (280, 76971), (420, 51314), (840, 25657)]