20197675780

素因数分解:

$2^2\times 5^1\times {\mathrm{139}}^1\times {\mathrm{2543}}^1\times {\mathrm{2857}}^1$

素因数の和:5548

約数の個数: 48

約数和(自身を含む): 42752021760

約数和(自身を除く): 22554345980

約数列:

[1, 2, 4, 5, 10, 20, 139, 278, 556, 695, 1390, 2543, 2780, 2857, 5086, 5714, 10172, 11428, 12715, 14285, 25430, 28570, 50860, 57140, 353477, 397123, 706954, 794246, 1413908, 1588492, 1767385, 1985615, 3534770, 3971230, 7069540, 7265351, 7942460, 14530702, 29061404, 36326755, 72653510, 145307020, 1009883789, 2019767578, 4039535156, 5049418945, 10098837890, 20197675780]

約数ペア:

[(1, 20197675780), (2, 10098837890), (4, 5049418945), (5, 4039535156), (10, 2019767578), (20, 1009883789), (139, 145307020), (278, 72653510), (556, 36326755), (695, 29061404), (1390, 14530702), (2543, 7942460), (2780, 7265351), (2857, 7069540), (5086, 3971230), (5714, 3534770), (10172, 1985615), (11428, 1767385), (12715, 1588492), (14285, 1413908), (25430, 794246), (28570, 706954), (50860, 397123), (57140, 353477)]