21005520

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{87523}}^1$

素因数の和:87539

約数の個数: 40

約数和(自身を含む): 65117856

約数和(自身を除く): 44112336

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 240, 87523, 175046, 262569, 350092, 437615, 525138, 700184, 875230, 1050276, 1312845, 1400368, 1750460, 2100552, 2625690, 3500920, 4201104, 5251380, 7001840, 10502760, 21005520]

約数ペア:

[(1, 21005520), (2, 10502760), (3, 7001840), (4, 5251380), (5, 4201104), (6, 3500920), (8, 2625690), (10, 2100552), (12, 1750460), (15, 1400368), (16, 1312845), (20, 1050276), (24, 875230), (30, 700184), (40, 525138), (48, 437615), (60, 350092), (80, 262569), (120, 175046), (240, 87523)]