20509160

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{89}}^1\times {\mathrm{823}}^1$

素因数の和:930

約数の個数: 64

約数和(自身を含む): 53395200

約数和(自身を除く): 32886040

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 89, 140, 178, 280, 356, 445, 623, 712, 823, 890, 1246, 1646, 1780, 2492, 3115, 3292, 3560, 4115, 4984, 5761, 6230, 6584, 8230, 11522, 12460, 16460, 23044, 24920, 28805, 32920, 46088, 57610, 73247, 115220, 146494, 230440, 292988, 366235, 512729, 585976, 732470, 1025458, 1464940, 2050916, 2563645, 2929880, 4101832, 5127290, 10254580, 20509160]

約数ペア:

[(1, 20509160), (2, 10254580), (4, 5127290), (5, 4101832), (7, 2929880), (8, 2563645), (10, 2050916), (14, 1464940), (20, 1025458), (28, 732470), (35, 585976), (40, 512729), (56, 366235), (70, 292988), (89, 230440), (140, 146494), (178, 115220), (280, 73247), (356, 57610), (445, 46088), (623, 32920), (712, 28805), (823, 24920), (890, 23044), (1246, 16460), (1646, 12460), (1780, 11522), (2492, 8230), (3115, 6584), (3292, 6230), (3560, 5761), (4115, 4984)]