20449420

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{14401}}^1$

素因数の和:14481

約数の個数: 24

約数和(自身を含む): 43551648

約数和(自身を除く): 23102228

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 14401, 28802, 57604, 72005, 144010, 288020, 1022471, 2044942, 4089884, 5112355, 10224710, 20449420]

約数ペア:

[(1, 20449420), (2, 10224710), (4, 5112355), (5, 4089884), (10, 2044942), (20, 1022471), (71, 288020), (142, 144010), (284, 72005), (355, 57604), (710, 28802), (1420, 14401)]