21379864

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{19}}^2\times {\mathrm{673}}^1$

素因数の和:728

約数の個数: 48

約数和(自身を含む): 46222920

約数和(自身を除く): 24843056

約数列:

[1, 2, 4, 8, 11, 19, 22, 38, 44, 76, 88, 152, 209, 361, 418, 673, 722, 836, 1346, 1444, 1672, 2692, 2888, 3971, 5384, 7403, 7942, 12787, 14806, 15884, 25574, 29612, 31768, 51148, 59224, 102296, 140657, 242953, 281314, 485906, 562628, 971812, 1125256, 1943624, 2672483, 5344966, 10689932, 21379864]

約数ペア:

[(1, 21379864), (2, 10689932), (4, 5344966), (8, 2672483), (11, 1943624), (19, 1125256), (22, 971812), (38, 562628), (44, 485906), (76, 281314), (88, 242953), (152, 140657), (209, 102296), (361, 59224), (418, 51148), (673, 31768), (722, 29612), (836, 25574), (1346, 15884), (1444, 14806), (1672, 12787), (2692, 7942), (2888, 7403), (3971, 5384)]