21362205

素因数分解:

$3^1\times 5^1\times {\mathrm{47}}^1\times {\mathrm{157}}^1\times {\mathrm{193}}^1$

素因数の和:405

約数の個数: 32

約数和(自身を含む): 35311104

約数和(自身を除く): 13948899

約数列:

[1, 3, 5, 15, 47, 141, 157, 193, 235, 471, 579, 705, 785, 965, 2355, 2895, 7379, 9071, 22137, 27213, 30301, 36895, 45355, 90903, 110685, 136065, 151505, 454515, 1424147, 4272441, 7120735, 21362205]

約数ペア:

[(1, 21362205), (3, 7120735), (5, 4272441), (15, 1424147), (47, 454515), (141, 151505), (157, 136065), (193, 110685), (235, 90903), (471, 45355), (579, 36895), (705, 30301), (785, 27213), (965, 22137), (2355, 9071), (2895, 7379)]