21981986

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{1213}}^1$

素因数の和:1286

約数の個数: 32

約数和(自身を含む): 38546928

約数和(自身を除く): 16564942

約数列:

[1, 2, 13, 17, 26, 34, 41, 82, 221, 442, 533, 697, 1066, 1213, 1394, 2426, 9061, 15769, 18122, 20621, 31538, 41242, 49733, 99466, 268073, 536146, 646529, 845461, 1293058, 1690922, 10990993, 21981986]

約数ペア:

[(1, 21981986), (2, 10990993), (13, 1690922), (17, 1293058), (26, 845461), (34, 646529), (41, 536146), (82, 268073), (221, 99466), (442, 49733), (533, 41242), (697, 31538), (1066, 20621), (1213, 18122), (1394, 15769), (2426, 9061)]