20688318

素因数分解:

$2^1\times 3^3\times 7^1\times {\mathrm{229}}^1\times {\mathrm{239}}^1$

素因数の和:486

約数の個数: 64

約数和(自身を含む): 52992000

約数和(自身を除く): 32303682

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 27, 42, 54, 63, 126, 189, 229, 239, 378, 458, 478, 687, 717, 1374, 1434, 1603, 1673, 2061, 2151, 3206, 3346, 4122, 4302, 4809, 5019, 6183, 6453, 9618, 10038, 12366, 12906, 14427, 15057, 28854, 30114, 43281, 45171, 54731, 86562, 90342, 109462, 164193, 328386, 383117, 492579, 766234, 985158, 1149351, 1477737, 2298702, 2955474, 3448053, 6896106, 10344159, 20688318]

約数ペア:

[(1, 20688318), (2, 10344159), (3, 6896106), (6, 3448053), (7, 2955474), (9, 2298702), (14, 1477737), (18, 1149351), (21, 985158), (27, 766234), (42, 492579), (54, 383117), (63, 328386), (126, 164193), (189, 109462), (229, 90342), (239, 86562), (378, 54731), (458, 45171), (478, 43281), (687, 30114), (717, 28854), (1374, 15057), (1434, 14427), (1603, 12906), (1673, 12366), (2061, 10038), (2151, 9618), (3206, 6453), (3346, 6183), (4122, 5019), (4302, 4809)]