31999912

素因数分解:

$2^3\times 7^1\times {\mathrm{43}}^1\times {\mathrm{97}}^1\times {\mathrm{137}}^1$

素因数の和:290

約数の個数: 64

約数和(自身を含む): 71406720

約数和(自身を除く): 39406808

約数列:

[1, 2, 4, 7, 8, 14, 28, 43, 56, 86, 97, 137, 172, 194, 274, 301, 344, 388, 548, 602, 679, 776, 959, 1096, 1204, 1358, 1918, 2408, 2716, 3836, 4171, 5432, 5891, 7672, 8342, 11782, 13289, 16684, 23564, 26578, 29197, 33368, 41237, 47128, 53156, 58394, 82474, 93023, 106312, 116788, 164948, 186046, 233576, 329896, 372092, 571427, 744184, 1142854, 2285708, 3999989, 4571416, 7999978, 15999956, 31999912]

約数ペア:

[(1, 31999912), (2, 15999956), (4, 7999978), (7, 4571416), (8, 3999989), (14, 2285708), (28, 1142854), (43, 744184), (56, 571427), (86, 372092), (97, 329896), (137, 233576), (172, 186046), (194, 164948), (274, 116788), (301, 106312), (344, 93023), (388, 82474), (548, 58394), (602, 53156), (679, 47128), (776, 41237), (959, 33368), (1096, 29197), (1204, 26578), (1358, 23564), (1918, 16684), (2408, 13289), (2716, 11782), (3836, 8342), (4171, 7672), (5432, 5891)]