21153920

素因数分解:

$2^7\times 5^1\times {\mathrm{33053}}^1$

素因数の和:33072

約数の個数: 32

約数和(自身を含む): 50572620

約数和(自身を除く): 29418700

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 33053, 66106, 132212, 165265, 264424, 330530, 528848, 661060, 1057696, 1322120, 2115392, 2644240, 4230784, 5288480, 10576960, 21153920]

約数ペア:

[(1, 21153920), (2, 10576960), (4, 5288480), (5, 4230784), (8, 2644240), (10, 2115392), (16, 1322120), (20, 1057696), (32, 661060), (40, 528848), (64, 330530), (80, 264424), (128, 165265), (160, 132212), (320, 66106), (640, 33053)]