21000366320

素因数分解:

$2^4\times 5^1\times {\mathrm{16187}}^1\times {\mathrm{16217}}^1$

素因数の和:32417

約数の個数: 40

約数和(自身を含む): 48831879024

約数和(自身を除く): 27831512704

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 16187, 16217, 32374, 32434, 64748, 64868, 80935, 81085, 129496, 129736, 161870, 162170, 258992, 259472, 323740, 324340, 647480, 648680, 1294960, 1297360, 262504579, 525009158, 1050018316, 1312522895, 2100036632, 2625045790, 4200073264, 5250091580, 10500183160, 21000366320]

約数ペア:

[(1, 21000366320), (2, 10500183160), (4, 5250091580), (5, 4200073264), (8, 2625045790), (10, 2100036632), (16, 1312522895), (20, 1050018316), (40, 525009158), (80, 262504579), (16187, 1297360), (16217, 1294960), (32374, 648680), (32434, 647480), (64748, 324340), (64868, 323740), (80935, 259472), (81085, 258992), (129496, 162170), (129736, 161870)]