21811816

素因数分解:

$2^3\times {\mathrm{13}}^3\times {\mathrm{17}}^1\times {\mathrm{73}}^1$

素因数の和:135

約数の個数: 64

約数和(自身を含む): 47552400

約数和(自身を除く): 25740584

約数列:

[1, 2, 4, 8, 13, 17, 26, 34, 52, 68, 73, 104, 136, 146, 169, 221, 292, 338, 442, 584, 676, 884, 949, 1241, 1352, 1768, 1898, 2197, 2482, 2873, 3796, 4394, 4964, 5746, 7592, 8788, 9928, 11492, 12337, 16133, 17576, 22984, 24674, 32266, 37349, 49348, 64532, 74698, 98696, 129064, 149396, 160381, 209729, 298792, 320762, 419458, 641524, 838916, 1283048, 1677832, 2726477, 5452954, 10905908, 21811816]

約数ペア:

[(1, 21811816), (2, 10905908), (4, 5452954), (8, 2726477), (13, 1677832), (17, 1283048), (26, 838916), (34, 641524), (52, 419458), (68, 320762), (73, 298792), (104, 209729), (136, 160381), (146, 149396), (169, 129064), (221, 98696), (292, 74698), (338, 64532), (442, 49348), (584, 37349), (676, 32266), (884, 24674), (949, 22984), (1241, 17576), (1352, 16133), (1768, 12337), (1898, 11492), (2197, 9928), (2482, 8788), (2873, 7592), (3796, 5746), (4394, 4964)]