21461920

素因数分解:

$2^5\times 5^1\times {\mathrm{31}}^1\times {\mathrm{4327}}^1$

素因数の和:4373

約数の個数: 48

約数和(自身を含む): 52351488

約数和(自身を除く): 30889568

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 80, 124, 155, 160, 248, 310, 496, 620, 992, 1240, 2480, 4327, 4960, 8654, 17308, 21635, 34616, 43270, 69232, 86540, 134137, 138464, 173080, 268274, 346160, 536548, 670685, 692320, 1073096, 1341370, 2146192, 2682740, 4292384, 5365480, 10730960, 21461920]

約数ペア:

[(1, 21461920), (2, 10730960), (4, 5365480), (5, 4292384), (8, 2682740), (10, 2146192), (16, 1341370), (20, 1073096), (31, 692320), (32, 670685), (40, 536548), (62, 346160), (80, 268274), (124, 173080), (155, 138464), (160, 134137), (248, 86540), (310, 69232), (496, 43270), (620, 34616), (992, 21635), (1240, 17308), (2480, 8654), (4327, 4960)]