20657450

素因数分解:

$2^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{23}}^2\times {\mathrm{71}}^1$

素因数の和:140

約数の個数: 72

約数和(自身を含む): 44434656

約数和(自身を除く): 23777206

約数列:

[1, 2, 5, 10, 11, 22, 23, 25, 46, 50, 55, 71, 110, 115, 142, 230, 253, 275, 355, 506, 529, 550, 575, 710, 781, 1058, 1150, 1265, 1562, 1633, 1775, 2530, 2645, 3266, 3550, 3905, 5290, 5819, 6325, 7810, 8165, 11638, 12650, 13225, 16330, 17963, 19525, 26450, 29095, 35926, 37559, 39050, 40825, 58190, 75118, 81650, 89815, 145475, 179630, 187795, 290950, 375590, 413149, 449075, 826298, 898150, 938975, 1877950, 2065745, 4131490, 10328725, 20657450]

約数ペア:

[(1, 20657450), (2, 10328725), (5, 4131490), (10, 2065745), (11, 1877950), (22, 938975), (23, 898150), (25, 826298), (46, 449075), (50, 413149), (55, 375590), (71, 290950), (110, 187795), (115, 179630), (142, 145475), (230, 89815), (253, 81650), (275, 75118), (355, 58190), (506, 40825), (529, 39050), (550, 37559), (575, 35926), (710, 29095), (781, 26450), (1058, 19525), (1150, 17963), (1265, 16330), (1562, 13225), (1633, 12650), (1775, 11638), (2530, 8165), (2645, 7810), (3266, 6325), (3550, 5819), (3905, 5290)]