21871916

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{61}}^1\times {\mathrm{281}}^1$

素因数の和:386

約数の個数: 48

約数和(自身を含む): 44059680

約数和(自身を除く): 22187764

約数列:

[1, 2, 4, 11, 22, 29, 44, 58, 61, 116, 122, 244, 281, 319, 562, 638, 671, 1124, 1276, 1342, 1769, 2684, 3091, 3538, 6182, 7076, 8149, 12364, 16298, 17141, 19459, 32596, 34282, 38918, 68564, 77836, 89639, 179278, 188551, 358556, 377102, 497089, 754204, 994178, 1988356, 5467979, 10935958, 21871916]

約数ペア:

[(1, 21871916), (2, 10935958), (4, 5467979), (11, 1988356), (22, 994178), (29, 754204), (44, 497089), (58, 377102), (61, 358556), (116, 188551), (122, 179278), (244, 89639), (281, 77836), (319, 68564), (562, 38918), (638, 34282), (671, 32596), (1124, 19459), (1276, 17141), (1342, 16298), (1769, 12364), (2684, 8149), (3091, 7076), (3538, 6182)]