21209454

素因数分解:

$2^1\times 3^2\times 7^2\times {\mathrm{139}}^1\times {\mathrm{173}}^1$

素因数の和:334

約数の個数: 72

約数和(自身を含む): 54152280

約数和(自身を除く): 32942826

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 49, 63, 98, 126, 139, 147, 173, 278, 294, 346, 417, 441, 519, 834, 882, 973, 1038, 1211, 1251, 1557, 1946, 2422, 2502, 2919, 3114, 3633, 5838, 6811, 7266, 8477, 8757, 10899, 13622, 16954, 17514, 20433, 21798, 24047, 25431, 40866, 48094, 50862, 61299, 72141, 76293, 122598, 144282, 152586, 168329, 216423, 336658, 432846, 504987, 1009974, 1178303, 1514961, 2356606, 3029922, 3534909, 7069818, 10604727, 21209454]

約数ペア:

[(1, 21209454), (2, 10604727), (3, 7069818), (6, 3534909), (7, 3029922), (9, 2356606), (14, 1514961), (18, 1178303), (21, 1009974), (42, 504987), (49, 432846), (63, 336658), (98, 216423), (126, 168329), (139, 152586), (147, 144282), (173, 122598), (278, 76293), (294, 72141), (346, 61299), (417, 50862), (441, 48094), (519, 40866), (834, 25431), (882, 24047), (973, 21798), (1038, 20433), (1211, 17514), (1251, 16954), (1557, 13622), (1946, 10899), (2422, 8757), (2502, 8477), (2919, 7266), (3114, 6811), (3633, 5838)]