21787668

素因数分解:

$2^2\times 3^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{2789}}^1$

素因数の和:2837

約数の個数: 72

約数和(自身を含む): 64995840

約数和(自身を除く): 43208172

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 28, 31, 36, 42, 62, 63, 84, 93, 124, 126, 186, 217, 252, 279, 372, 434, 558, 651, 868, 1116, 1302, 1953, 2604, 2789, 3906, 5578, 7812, 8367, 11156, 16734, 19523, 25101, 33468, 39046, 50202, 58569, 78092, 86459, 100404, 117138, 172918, 175707, 234276, 259377, 345836, 351414, 518754, 605213, 702828, 778131, 1037508, 1210426, 1556262, 1815639, 2420852, 3112524, 3631278, 5446917, 7262556, 10893834, 21787668]

約数ペア:

[(1, 21787668), (2, 10893834), (3, 7262556), (4, 5446917), (6, 3631278), (7, 3112524), (9, 2420852), (12, 1815639), (14, 1556262), (18, 1210426), (21, 1037508), (28, 778131), (31, 702828), (36, 605213), (42, 518754), (62, 351414), (63, 345836), (84, 259377), (93, 234276), (124, 175707), (126, 172918), (186, 117138), (217, 100404), (252, 86459), (279, 78092), (372, 58569), (434, 50202), (558, 39046), (651, 33468), (868, 25101), (1116, 19523), (1302, 16734), (1953, 11156), (2604, 8367), (2789, 7812), (3906, 5578)]