220173640

素因数分解:

$2^3\times 5^1\times {\mathrm{173}}^1\times {\mathrm{31817}}^1$

素因数の和:32001

約数の個数: 32

約数和(自身を含む): 498269880

約数和(自身を除く): 278096240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 173, 346, 692, 865, 1384, 1730, 3460, 6920, 31817, 63634, 127268, 159085, 254536, 318170, 636340, 1272680, 5504341, 11008682, 22017364, 27521705, 44034728, 55043410, 110086820, 220173640]

約数ペア:

[(1, 220173640), (2, 110086820), (4, 55043410), (5, 44034728), (8, 27521705), (10, 22017364), (20, 11008682), (40, 5504341), (173, 1272680), (346, 636340), (692, 318170), (865, 254536), (1384, 159085), (1730, 127268), (3460, 63634), (6920, 31817)]