21235864

素因数分解:

$2^3\times {\mathrm{13}}^2\times {\mathrm{113}}^1\times {\mathrm{139}}^1$

素因数の和:284

約数の個数: 48

約数和(自身を含む): 43810200

約数和(自身を除く): 22574336

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 113, 139, 169, 226, 278, 338, 452, 556, 676, 904, 1112, 1352, 1469, 1807, 2938, 3614, 5876, 7228, 11752, 14456, 15707, 19097, 23491, 31414, 38194, 46982, 62828, 76388, 93964, 125656, 152776, 187928, 204191, 408382, 816764, 1633528, 2654483, 5308966, 10617932, 21235864]

約数ペア:

[(1, 21235864), (2, 10617932), (4, 5308966), (8, 2654483), (13, 1633528), (26, 816764), (52, 408382), (104, 204191), (113, 187928), (139, 152776), (169, 125656), (226, 93964), (278, 76388), (338, 62828), (452, 46982), (556, 38194), (676, 31414), (904, 23491), (1112, 19097), (1352, 15707), (1469, 14456), (1807, 11752), (2938, 7228), (3614, 5876)]