21515728

素因数分解:

$2^4\times {\mathrm{13}}^2\times {\mathrm{73}}^1\times {\mathrm{109}}^1$

素因数の和:216

約数の個数: 60

約数和(自身を含む): 46178220

約数和(自身を除く): 24662492

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 73, 104, 109, 146, 169, 208, 218, 292, 338, 436, 584, 676, 872, 949, 1168, 1352, 1417, 1744, 1898, 2704, 2834, 3796, 5668, 7592, 7957, 11336, 12337, 15184, 15914, 18421, 22672, 24674, 31828, 36842, 49348, 63656, 73684, 98696, 103441, 127312, 147368, 197392, 206882, 294736, 413764, 827528, 1344733, 1655056, 2689466, 5378932, 10757864, 21515728]

約数ペア:

[(1, 21515728), (2, 10757864), (4, 5378932), (8, 2689466), (13, 1655056), (16, 1344733), (26, 827528), (52, 413764), (73, 294736), (104, 206882), (109, 197392), (146, 147368), (169, 127312), (208, 103441), (218, 98696), (292, 73684), (338, 63656), (436, 49348), (584, 36842), (676, 31828), (872, 24674), (949, 22672), (1168, 18421), (1352, 15914), (1417, 15184), (1744, 12337), (1898, 11336), (2704, 7957), (2834, 7592), (3796, 5668)]