21321920

素因数分解:

$2^6\times 5^1\times {\mathrm{23}}^1\times {\mathrm{2897}}^1$

素因数の和:2937

約数の個数: 56

約数和(自身を含む): 52998624

約数和(自身を除く): 31676704

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 32, 40, 46, 64, 80, 92, 115, 160, 184, 230, 320, 368, 460, 736, 920, 1472, 1840, 2897, 3680, 5794, 7360, 11588, 14485, 23176, 28970, 46352, 57940, 66631, 92704, 115880, 133262, 185408, 231760, 266524, 333155, 463520, 533048, 666310, 927040, 1066096, 1332620, 2132192, 2665240, 4264384, 5330480, 10660960, 21321920]

約数ペア:

[(1, 21321920), (2, 10660960), (4, 5330480), (5, 4264384), (8, 2665240), (10, 2132192), (16, 1332620), (20, 1066096), (23, 927040), (32, 666310), (40, 533048), (46, 463520), (64, 333155), (80, 266524), (92, 231760), (115, 185408), (160, 133262), (184, 115880), (230, 92704), (320, 66631), (368, 57940), (460, 46352), (736, 28970), (920, 23176), (1472, 14485), (1840, 11588), (2897, 7360), (3680, 5794)]