20370980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{227}}^1\times {\mathrm{641}}^1$

素因数の和:884

約数の個数: 48

約数和(自身を含む): 49182336

約数和(自身を除く): 28811356

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 227, 454, 641, 908, 1135, 1282, 1589, 2270, 2564, 3178, 3205, 4487, 4540, 6356, 6410, 7945, 8974, 12820, 15890, 17948, 22435, 31780, 44870, 89740, 145507, 291014, 582028, 727535, 1018549, 1455070, 2037098, 2910140, 4074196, 5092745, 10185490, 20370980]

約数ペア:

[(1, 20370980), (2, 10185490), (4, 5092745), (5, 4074196), (7, 2910140), (10, 2037098), (14, 1455070), (20, 1018549), (28, 727535), (35, 582028), (70, 291014), (140, 145507), (227, 89740), (454, 44870), (641, 31780), (908, 22435), (1135, 17948), (1282, 15890), (1589, 12820), (2270, 8974), (2564, 7945), (3178, 6410), (3205, 6356), (4487, 4540)]