21513540

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{367}}^1\times {\mathrm{977}}^1$

素因数の和:1356

約数の個数: 48

約数和(自身を含む): 60463872

約数和(自身を除く): 38950332

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 367, 734, 977, 1101, 1468, 1835, 1954, 2202, 2931, 3670, 3908, 4404, 4885, 5505, 5862, 7340, 9770, 11010, 11724, 14655, 19540, 22020, 29310, 58620, 358559, 717118, 1075677, 1434236, 1792795, 2151354, 3585590, 4302708, 5378385, 7171180, 10756770, 21513540]

約数ペア:

[(1, 21513540), (2, 10756770), (3, 7171180), (4, 5378385), (5, 4302708), (6, 3585590), (10, 2151354), (12, 1792795), (15, 1434236), (20, 1075677), (30, 717118), (60, 358559), (367, 58620), (734, 29310), (977, 22020), (1101, 19540), (1468, 14655), (1835, 11724), (1954, 11010), (2202, 9770), (2931, 7340), (3670, 5862), (3908, 5505), (4404, 4885)]