20999664

素因数分解:

$2^4\times 3^2\times 7^1\times {\mathrm{83}}^1\times {\mathrm{251}}^1$

素因数の和:355

約数の個数: 120

約数和(自身を含む): 68245632

約数和(自身を除く): 47245968

約数列:

[1, 2, 3, 4, 6, 7, 8, 9, 12, 14, 16, 18, 21, 24, 28, 36, 42, 48, 56, 63, 72, 83, 84, 112, 126, 144, 166, 168, 249, 251, 252, 332, 336, 498, 502, 504, 581, 664, 747, 753, 996, 1004, 1008, 1162, 1328, 1494, 1506, 1743, 1757, 1992, 2008, 2259, 2324, 2988, 3012, 3486, 3514, 3984, 4016, 4518, 4648, 5229, 5271, 5976, 6024, 6972, 7028, 9036, 9296, 10458, 10542, 11952, 12048, 13944, 14056, 15813, 18072, 20833, 20916, 21084, 27888, 28112, 31626, 36144, 41666, 41832, 42168, 62499, 63252, 83332, 83664, 84336, 124998, 126504, 145831, 166664, 187497, 249996, 253008, 291662, 333328, 374994, 437493, 499992, 583324, 749988, 874986, 999984, 1166648, 1312479, 1499976, 1749972, 2333296, 2624958, 2999952, 3499944, 5249916, 6999888, 10499832, 20999664]

約数ペア:

[(1, 20999664), (2, 10499832), (3, 6999888), (4, 5249916), (6, 3499944), (7, 2999952), (8, 2624958), (9, 2333296), (12, 1749972), (14, 1499976), (16, 1312479), (18, 1166648), (21, 999984), (24, 874986), (28, 749988), (36, 583324), (42, 499992), (48, 437493), (56, 374994), (63, 333328), (72, 291662), (83, 253008), (84, 249996), (112, 187497), (126, 166664), (144, 145831), (166, 126504), (168, 124998), (249, 84336), (251, 83664), (252, 83332), (332, 63252), (336, 62499), (498, 42168), (502, 41832), (504, 41666), (581, 36144), (664, 31626), (747, 28112), (753, 27888), (996, 21084), (1004, 20916), (1008, 20833), (1162, 18072), (1328, 15813), (1494, 14056), (1506, 13944), (1743, 12048), (1757, 11952), (1992, 10542), (2008, 10458), (2259, 9296), (2324, 9036), (2988, 7028), (3012, 6972), (3486, 6024), (3514, 5976), (3984, 5271), (4016, 5229), (4518, 4648)]