18919089

素因数分解:

$3^4\times 7^1\times {\mathrm{61}}^1\times {\mathrm{547}}^1$

素因数の和:627

約数の個数: 40

約数和(自身を含む): 32888768

約数和(自身を除く): 13969679

約数列:

[1, 3, 7, 9, 21, 27, 61, 63, 81, 183, 189, 427, 547, 549, 567, 1281, 1641, 1647, 3829, 3843, 4923, 4941, 11487, 11529, 14769, 33367, 34461, 34587, 44307, 100101, 103383, 233569, 300303, 310149, 700707, 900909, 2102121, 2702727, 6306363, 18919089]

約数ペア:

[(1, 18919089), (3, 6306363), (7, 2702727), (9, 2102121), (21, 900909), (27, 700707), (61, 310149), (63, 300303), (81, 233569), (183, 103383), (189, 100101), (427, 44307), (547, 34587), (549, 34461), (567, 33367), (1281, 14769), (1641, 11529), (1647, 11487), (3829, 4941), (3843, 4923)]