21453728

素因数分解:

$2^5\times {\mathrm{17}}^1\times {\mathrm{113}}^1\times {\mathrm{349}}^1$

素因数の和:489

約数の個数: 48

約数和(自身を含む): 45246600

約数和(自身を除く): 23792872

約数列:

[1, 2, 4, 8, 16, 17, 32, 34, 68, 113, 136, 226, 272, 349, 452, 544, 698, 904, 1396, 1808, 1921, 2792, 3616, 3842, 5584, 5933, 7684, 11168, 11866, 15368, 23732, 30736, 39437, 47464, 61472, 78874, 94928, 157748, 189856, 315496, 630992, 670429, 1261984, 1340858, 2681716, 5363432, 10726864, 21453728]

約数ペア:

[(1, 21453728), (2, 10726864), (4, 5363432), (8, 2681716), (16, 1340858), (17, 1261984), (32, 670429), (34, 630992), (68, 315496), (113, 189856), (136, 157748), (226, 94928), (272, 78874), (349, 61472), (452, 47464), (544, 39437), (698, 30736), (904, 23732), (1396, 15368), (1808, 11866), (1921, 11168), (2792, 7684), (3616, 5933), (3842, 5584)]