388595720

素因数分解:

$2^3\times 5^1\times {\mathrm{821}}^1\times {\mathrm{11833}}^1$

素因数の和:12665

約数の個数: 32

約数和(自身を含む): 875479320

約数和(自身を除く): 486883600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 821, 1642, 3284, 4105, 6568, 8210, 11833, 16420, 23666, 32840, 47332, 59165, 94664, 118330, 236660, 473320, 9714893, 19429786, 38859572, 48574465, 77719144, 97148930, 194297860, 388595720]

約数ペア:

[(1, 388595720), (2, 194297860), (4, 97148930), (5, 77719144), (8, 48574465), (10, 38859572), (20, 19429786), (40, 9714893), (821, 473320), (1642, 236660), (3284, 118330), (4105, 94664), (6568, 59165), (8210, 47332), (11833, 32840), (16420, 23666)]