18385780

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{73}}^1\times {\mathrm{257}}^1$

素因数の和:353

約数の個数: 72

約数和(自身を含む): 45706248

約数和(自身を除く): 27320468

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 73, 98, 140, 146, 196, 245, 257, 292, 365, 490, 511, 514, 730, 980, 1022, 1028, 1285, 1460, 1799, 2044, 2555, 2570, 3577, 3598, 5110, 5140, 7154, 7196, 8995, 10220, 12593, 14308, 17885, 17990, 18761, 25186, 35770, 35980, 37522, 50372, 62965, 71540, 75044, 93805, 125930, 131327, 187610, 251860, 262654, 375220, 525308, 656635, 919289, 1313270, 1838578, 2626540, 3677156, 4596445, 9192890, 18385780]

約数ペア:

[(1, 18385780), (2, 9192890), (4, 4596445), (5, 3677156), (7, 2626540), (10, 1838578), (14, 1313270), (20, 919289), (28, 656635), (35, 525308), (49, 375220), (70, 262654), (73, 251860), (98, 187610), (140, 131327), (146, 125930), (196, 93805), (245, 75044), (257, 71540), (292, 62965), (365, 50372), (490, 37522), (511, 35980), (514, 35770), (730, 25186), (980, 18761), (1022, 17990), (1028, 17885), (1285, 14308), (1460, 12593), (1799, 10220), (2044, 8995), (2555, 7196), (2570, 7154), (3577, 5140), (3598, 5110)]