724640

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{647}}^1$

素因数の和:669

約数の個数: 48

約数和(自身を含む): 1959552

約数和(自身を除く): 1234912

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 70, 80, 112, 140, 160, 224, 280, 560, 647, 1120, 1294, 2588, 3235, 4529, 5176, 6470, 9058, 10352, 12940, 18116, 20704, 22645, 25880, 36232, 45290, 51760, 72464, 90580, 103520, 144928, 181160, 362320, 724640]

約数ペア:

[(1, 724640), (2, 362320), (4, 181160), (5, 144928), (7, 103520), (8, 90580), (10, 72464), (14, 51760), (16, 45290), (20, 36232), (28, 25880), (32, 22645), (35, 20704), (40, 18116), (56, 12940), (70, 10352), (80, 9058), (112, 6470), (140, 5176), (160, 4529), (224, 3235), (280, 2588), (560, 1294), (647, 1120)]