398895680

素因数分解:

$2^6\times 5^1\times {\mathrm{769}}^1\times {\mathrm{1621}}^1$

素因数の和:2407

約数の個数: 56

約数和(自身を含む): 951692280

約数和(自身を除く): 552796600

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 769, 1538, 1621, 3076, 3242, 3845, 6152, 6484, 7690, 8105, 12304, 12968, 15380, 16210, 24608, 25936, 30760, 32420, 49216, 51872, 61520, 64840, 103744, 123040, 129680, 246080, 259360, 518720, 1246549, 2493098, 4986196, 6232745, 9972392, 12465490, 19944784, 24930980, 39889568, 49861960, 79779136, 99723920, 199447840, 398895680]

約数ペア:

[(1, 398895680), (2, 199447840), (4, 99723920), (5, 79779136), (8, 49861960), (10, 39889568), (16, 24930980), (20, 19944784), (32, 12465490), (40, 9972392), (64, 6232745), (80, 4986196), (160, 2493098), (320, 1246549), (769, 518720), (1538, 259360), (1621, 246080), (3076, 129680), (3242, 123040), (3845, 103744), (6152, 64840), (6484, 61520), (7690, 51872), (8105, 49216), (12304, 32420), (12968, 30760), (15380, 25936), (16210, 24608)]