21000306586

素因数分解:

$2^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{83}}^1\times {\mathrm{13397}}^1$

素因数の和:13579

約数の個数: 64

約数和(自身を含む): 38894929920

約数和(自身を除く): 17894623334

約数列:

[1, 2, 7, 14, 19, 38, 71, 83, 133, 142, 166, 266, 497, 581, 994, 1162, 1349, 1577, 2698, 3154, 5893, 9443, 11039, 11786, 13397, 18886, 22078, 26794, 41251, 82502, 93779, 111967, 187558, 223934, 254543, 509086, 783769, 951187, 1111951, 1567538, 1781801, 1902374, 2223902, 3563602, 6658309, 7783657, 13316618, 15567314, 18072553, 21127069, 36145106, 42254138, 78948521, 126507871, 147889483, 157897042, 253015742, 295778966, 552639647, 1105279294, 1500021899, 3000043798, 10500153293, 21000306586]

約数ペア:

[(1, 21000306586), (2, 10500153293), (7, 3000043798), (14, 1500021899), (19, 1105279294), (38, 552639647), (71, 295778966), (83, 253015742), (133, 157897042), (142, 147889483), (166, 126507871), (266, 78948521), (497, 42254138), (581, 36145106), (994, 21127069), (1162, 18072553), (1349, 15567314), (1577, 13316618), (2698, 7783657), (3154, 6658309), (5893, 3563602), (9443, 2223902), (11039, 1902374), (11786, 1781801), (13397, 1567538), (18886, 1111951), (22078, 951187), (26794, 783769), (41251, 509086), (82502, 254543), (93779, 223934), (111967, 187558)]