21316328

素因数分解:

$2^3\times {\mathrm{11}}^2\times {\mathrm{19}}^2\times {\mathrm{61}}^1$

素因数の和:127

約数の個数: 72

約数和(自身を含む): 47125890

約数和(自身を除く): 25809562

約数列:

[1, 2, 4, 8, 11, 19, 22, 38, 44, 61, 76, 88, 121, 122, 152, 209, 242, 244, 361, 418, 484, 488, 671, 722, 836, 968, 1159, 1342, 1444, 1672, 2299, 2318, 2684, 2888, 3971, 4598, 4636, 5368, 7381, 7942, 9196, 9272, 12749, 14762, 15884, 18392, 22021, 25498, 29524, 31768, 43681, 44042, 50996, 59048, 87362, 88084, 101992, 140239, 174724, 176168, 242231, 280478, 349448, 484462, 560956, 968924, 1121912, 1937848, 2664541, 5329082, 10658164, 21316328]

約数ペア:

[(1, 21316328), (2, 10658164), (4, 5329082), (8, 2664541), (11, 1937848), (19, 1121912), (22, 968924), (38, 560956), (44, 484462), (61, 349448), (76, 280478), (88, 242231), (121, 176168), (122, 174724), (152, 140239), (209, 101992), (242, 88084), (244, 87362), (361, 59048), (418, 50996), (484, 44042), (488, 43681), (671, 31768), (722, 29524), (836, 25498), (968, 22021), (1159, 18392), (1342, 15884), (1444, 14762), (1672, 12749), (2299, 9272), (2318, 9196), (2684, 7942), (2888, 7381), (3971, 5368), (4598, 4636)]