28191940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{2549}}^1$

素因数の和:2644

約数の個数: 48

約数和(自身を含む): 68544000

約数和(自身を除く): 40352060

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 79, 140, 158, 316, 395, 553, 790, 1106, 1580, 2212, 2549, 2765, 5098, 5530, 10196, 11060, 12745, 17843, 25490, 35686, 50980, 71372, 89215, 178430, 201371, 356860, 402742, 805484, 1006855, 1409597, 2013710, 2819194, 4027420, 5638388, 7047985, 14095970, 28191940]

約数ペア:

[(1, 28191940), (2, 14095970), (4, 7047985), (5, 5638388), (7, 4027420), (10, 2819194), (14, 2013710), (20, 1409597), (28, 1006855), (35, 805484), (70, 402742), (79, 356860), (140, 201371), (158, 178430), (316, 89215), (395, 71372), (553, 50980), (790, 35686), (1106, 25490), (1580, 17843), (2212, 12745), (2549, 11060), (2765, 10196), (5098, 5530)]