20748735

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{199}}^1\times {\mathrm{331}}^1$

素因数の和:548

約数の個数: 48

約数和(自身を含む): 41433600

約数和(自身を除く): 20684865

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 199, 315, 331, 597, 993, 995, 1393, 1655, 1791, 2317, 2979, 2985, 4179, 4965, 6951, 6965, 8955, 11585, 12537, 14895, 20853, 20895, 34755, 62685, 65869, 104265, 197607, 329345, 461083, 592821, 988035, 1383249, 2305415, 2964105, 4149747, 6916245, 20748735]

約数ペア:

[(1, 20748735), (3, 6916245), (5, 4149747), (7, 2964105), (9, 2305415), (15, 1383249), (21, 988035), (35, 592821), (45, 461083), (63, 329345), (105, 197607), (199, 104265), (315, 65869), (331, 62685), (597, 34755), (993, 20895), (995, 20853), (1393, 14895), (1655, 12537), (1791, 11585), (2317, 8955), (2979, 6965), (2985, 6951), (4179, 4965)]