278997897

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{73}}^1\times {\mathrm{137}}^1\times {\mathrm{547}}^1$

素因数の和:777

約数の個数: 32

約数和(自身を含む): 402924672

約数和(自身を除く): 123926775

約数列:

[1, 3, 17, 51, 73, 137, 219, 411, 547, 1241, 1641, 2329, 3723, 6987, 9299, 10001, 27897, 30003, 39931, 74939, 119793, 170017, 224817, 510051, 678827, 1273963, 2036481, 3821889, 5470547, 16411641, 92999299, 278997897]

約数ペア:

[(1, 278997897), (3, 92999299), (17, 16411641), (51, 5470547), (73, 3821889), (137, 2036481), (219, 1273963), (411, 678827), (547, 510051), (1241, 224817), (1641, 170017), (2329, 119793), (3723, 74939), (6987, 39931), (9299, 30003), (10001, 27897)]