21121506

素因数分解:

$2^1\times 3^3\times 7^1\times {\mathrm{71}}^1\times {\mathrm{787}}^1$

素因数の和:876

約数の個数: 64

約数和(自身を含む): 54466560

約数和(自身を除く): 33345054

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 27, 42, 54, 63, 71, 126, 142, 189, 213, 378, 426, 497, 639, 787, 994, 1278, 1491, 1574, 1917, 2361, 2982, 3834, 4473, 4722, 5509, 7083, 8946, 11018, 13419, 14166, 16527, 21249, 26838, 33054, 42498, 49581, 55877, 99162, 111754, 148743, 167631, 297486, 335262, 391139, 502893, 782278, 1005786, 1173417, 1508679, 2346834, 3017358, 3520251, 7040502, 10560753, 21121506]

約数ペア:

[(1, 21121506), (2, 10560753), (3, 7040502), (6, 3520251), (7, 3017358), (9, 2346834), (14, 1508679), (18, 1173417), (21, 1005786), (27, 782278), (42, 502893), (54, 391139), (63, 335262), (71, 297486), (126, 167631), (142, 148743), (189, 111754), (213, 99162), (378, 55877), (426, 49581), (497, 42498), (639, 33054), (787, 26838), (994, 21249), (1278, 16527), (1491, 14166), (1574, 13419), (1917, 11018), (2361, 8946), (2982, 7083), (3834, 5509), (4473, 4722)]