21298772

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{349}}^1$

素因数の和:456

約数の個数: 48

約数和(自身を含む): 43512000

約数和(自身を除く): 22213228

約数列:

[1, 2, 4, 11, 19, 22, 38, 44, 73, 76, 146, 209, 292, 349, 418, 698, 803, 836, 1387, 1396, 1606, 2774, 3212, 3839, 5548, 6631, 7678, 13262, 15257, 15356, 25477, 26524, 30514, 50954, 61028, 72941, 101908, 145882, 280247, 291764, 484063, 560494, 968126, 1120988, 1936252, 5324693, 10649386, 21298772]

約数ペア:

[(1, 21298772), (2, 10649386), (4, 5324693), (11, 1936252), (19, 1120988), (22, 968126), (38, 560494), (44, 484063), (73, 291764), (76, 280247), (146, 145882), (209, 101908), (292, 72941), (349, 61028), (418, 50954), (698, 30514), (803, 26524), (836, 25477), (1387, 15356), (1396, 15257), (1606, 13262), (2774, 7678), (3212, 6631), (3839, 5548)]