21991494

素因数分解:

$2^1\times 3^1\times 7^2\times {\mathrm{131}}^1\times {\mathrm{571}}^1$

素因数の和:721

約数の個数: 48

約数和(自身を含む): 51644736

約数和(自身を除く): 29653242

約数列:

[1, 2, 3, 6, 7, 14, 21, 42, 49, 98, 131, 147, 262, 294, 393, 571, 786, 917, 1142, 1713, 1834, 2751, 3426, 3997, 5502, 6419, 7994, 11991, 12838, 19257, 23982, 27979, 38514, 55958, 74801, 83937, 149602, 167874, 224403, 448806, 523607, 1047214, 1570821, 3141642, 3665249, 7330498, 10995747, 21991494]

約数ペア:

[(1, 21991494), (2, 10995747), (3, 7330498), (6, 3665249), (7, 3141642), (14, 1570821), (21, 1047214), (42, 523607), (49, 448806), (98, 224403), (131, 167874), (147, 149602), (262, 83937), (294, 74801), (393, 55958), (571, 38514), (786, 27979), (917, 23982), (1142, 19257), (1713, 12838), (1834, 11991), (2751, 7994), (3426, 6419), (3997, 5502)]