400428

素因数分解:

$2^2\times 3^2\times 7^2\times {\mathrm{227}}^1$

素因数の和:251

約数の個数: 54

約数和(自身を含む): 1182636

約数和(自身を除く): 782208

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 28, 36, 42, 49, 63, 84, 98, 126, 147, 196, 227, 252, 294, 441, 454, 588, 681, 882, 908, 1362, 1589, 1764, 2043, 2724, 3178, 4086, 4767, 6356, 8172, 9534, 11123, 14301, 19068, 22246, 28602, 33369, 44492, 57204, 66738, 100107, 133476, 200214, 400428]

約数ペア:

[(1, 400428), (2, 200214), (3, 133476), (4, 100107), (6, 66738), (7, 57204), (9, 44492), (12, 33369), (14, 28602), (18, 22246), (21, 19068), (28, 14301), (36, 11123), (42, 9534), (49, 8172), (63, 6356), (84, 4767), (98, 4086), (126, 3178), (147, 2724), (196, 2043), (227, 1764), (252, 1589), (294, 1362), (441, 908), (454, 882), (588, 681)]