21596740

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{1103}}^1$

素因数の和:1212

約数の個数: 48

約数和(自身を含む): 50077440

約数和(自身を除く): 28480700

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 89, 110, 178, 220, 356, 445, 890, 979, 1103, 1780, 1958, 2206, 3916, 4412, 4895, 5515, 9790, 11030, 12133, 19580, 22060, 24266, 48532, 60665, 98167, 121330, 196334, 242660, 392668, 490835, 981670, 1079837, 1963340, 2159674, 4319348, 5399185, 10798370, 21596740]

約数ペア:

[(1, 21596740), (2, 10798370), (4, 5399185), (5, 4319348), (10, 2159674), (11, 1963340), (20, 1079837), (22, 981670), (44, 490835), (55, 392668), (89, 242660), (110, 196334), (178, 121330), (220, 98167), (356, 60665), (445, 48532), (890, 24266), (979, 22060), (1103, 19580), (1780, 12133), (1958, 11030), (2206, 9790), (3916, 5515), (4412, 4895)]