208539175

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{67}}^1\times {\mathrm{157}}^1$

素因数の和:308

約数の個数: 48

約数和(自身を含む): 289099552

約数和(自身を除く): 80560377

約数列:

[1, 5, 13, 25, 61, 65, 67, 157, 305, 325, 335, 785, 793, 871, 1525, 1675, 2041, 3925, 3965, 4087, 4355, 9577, 10205, 10519, 19825, 20435, 21775, 47885, 51025, 52595, 53131, 102175, 124501, 136747, 239425, 262975, 265655, 622505, 641659, 683735, 1328275, 3112525, 3208295, 3418675, 8341567, 16041475, 41707835, 208539175]

約数ペア:

[(1, 208539175), (5, 41707835), (13, 16041475), (25, 8341567), (61, 3418675), (65, 3208295), (67, 3112525), (157, 1328275), (305, 683735), (325, 641659), (335, 622505), (785, 265655), (793, 262975), (871, 239425), (1525, 136747), (1675, 124501), (2041, 102175), (3925, 53131), (3965, 52595), (4087, 51025), (4355, 47885), (9577, 21775), (10205, 20435), (10519, 19825)]