21979276

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{431}}^1$

素因数の和:526

約数の個数: 48

約数和(自身を含む): 44997120

約数和(自身を除く): 23017844

約数列:

[1, 2, 4, 11, 19, 22, 38, 44, 61, 76, 122, 209, 244, 418, 431, 671, 836, 862, 1159, 1342, 1724, 2318, 2684, 4636, 4741, 8189, 9482, 12749, 16378, 18964, 25498, 26291, 32756, 50996, 52582, 90079, 105164, 180158, 289201, 360316, 499529, 578402, 999058, 1156804, 1998116, 5494819, 10989638, 21979276]

約数ペア:

[(1, 21979276), (2, 10989638), (4, 5494819), (11, 1998116), (19, 1156804), (22, 999058), (38, 578402), (44, 499529), (61, 360316), (76, 289201), (122, 180158), (209, 105164), (244, 90079), (418, 52582), (431, 50996), (671, 32756), (836, 26291), (862, 25498), (1159, 18964), (1342, 16378), (1724, 12749), (2318, 9482), (2684, 8189), (4636, 4741)]