21731955

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{139}}^1\times {\mathrm{1489}}^1$

素因数の和:1643

約数の個数: 32

約数和(自身を含む): 40051200

約数和(自身を除く): 18319245

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 139, 417, 695, 973, 1489, 2085, 2919, 4467, 4865, 7445, 10423, 14595, 22335, 31269, 52115, 156345, 206971, 620913, 1034855, 1448797, 3104565, 4346391, 7243985, 21731955]

約数ペア:

[(1, 21731955), (3, 7243985), (5, 4346391), (7, 3104565), (15, 1448797), (21, 1034855), (35, 620913), (105, 206971), (139, 156345), (417, 52115), (695, 31269), (973, 22335), (1489, 14595), (2085, 10423), (2919, 7445), (4467, 4865)]