20501728

素因数分解:

$2^5\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{223}}^1$

素因数の和:276

約数の個数: 72

約数和(自身を含む): 46484928

約数和(自身を除く): 25983200

約数列:

[1, 2, 4, 8, 13, 16, 17, 26, 32, 34, 52, 68, 104, 136, 169, 208, 221, 223, 272, 338, 416, 442, 446, 544, 676, 884, 892, 1352, 1768, 1784, 2704, 2873, 2899, 3536, 3568, 3791, 5408, 5746, 5798, 7072, 7136, 7582, 11492, 11596, 15164, 22984, 23192, 30328, 37687, 45968, 46384, 49283, 60656, 75374, 91936, 92768, 98566, 121312, 150748, 197132, 301496, 394264, 602992, 640679, 788528, 1205984, 1281358, 1577056, 2562716, 5125432, 10250864, 20501728]

約数ペア:

[(1, 20501728), (2, 10250864), (4, 5125432), (8, 2562716), (13, 1577056), (16, 1281358), (17, 1205984), (26, 788528), (32, 640679), (34, 602992), (52, 394264), (68, 301496), (104, 197132), (136, 150748), (169, 121312), (208, 98566), (221, 92768), (223, 91936), (272, 75374), (338, 60656), (416, 49283), (442, 46384), (446, 45968), (544, 37687), (676, 30328), (884, 23192), (892, 22984), (1352, 15164), (1768, 11596), (1784, 11492), (2704, 7582), (2873, 7136), (2899, 7072), (3536, 5798), (3568, 5746), (3791, 5408)]