28815920

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{7351}}^1$

素因数の和:7378

約数の個数: 60

約数和(自身を含む): 77945904

約数和(自身を除く): 49129984

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 49, 56, 70, 80, 98, 112, 140, 196, 245, 280, 392, 490, 560, 784, 980, 1960, 3920, 7351, 14702, 29404, 36755, 51457, 58808, 73510, 102914, 117616, 147020, 205828, 257285, 294040, 360199, 411656, 514570, 588080, 720398, 823312, 1029140, 1440796, 1800995, 2058280, 2881592, 3601990, 4116560, 5763184, 7203980, 14407960, 28815920]

約数ペア:

[(1, 28815920), (2, 14407960), (4, 7203980), (5, 5763184), (7, 4116560), (8, 3601990), (10, 2881592), (14, 2058280), (16, 1800995), (20, 1440796), (28, 1029140), (35, 823312), (40, 720398), (49, 588080), (56, 514570), (70, 411656), (80, 360199), (98, 294040), (112, 257285), (140, 205828), (196, 147020), (245, 117616), (280, 102914), (392, 73510), (490, 58808), (560, 51457), (784, 36755), (980, 29404), (1960, 14702), (3920, 7351)]