20955246

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{53}}^1\times {\mathrm{137}}^1$

素因数の和:245

約数の個数: 64

約数和(自身を含む): 47573568

約数和(自身を除く): 26618322

約数列:

[1, 2, 3, 6, 13, 26, 37, 39, 53, 74, 78, 106, 111, 137, 159, 222, 274, 318, 411, 481, 689, 822, 962, 1378, 1443, 1781, 1961, 2067, 2886, 3562, 3922, 4134, 5069, 5343, 5883, 7261, 10138, 10686, 11766, 14522, 15207, 21783, 25493, 30414, 43566, 50986, 65897, 76479, 94393, 131794, 152958, 188786, 197691, 268657, 283179, 395382, 537314, 566358, 805971, 1611942, 3492541, 6985082, 10477623, 20955246]

約数ペア:

[(1, 20955246), (2, 10477623), (3, 6985082), (6, 3492541), (13, 1611942), (26, 805971), (37, 566358), (39, 537314), (53, 395382), (74, 283179), (78, 268657), (106, 197691), (111, 188786), (137, 152958), (159, 131794), (222, 94393), (274, 76479), (318, 65897), (411, 50986), (481, 43566), (689, 30414), (822, 25493), (962, 21783), (1378, 15207), (1443, 14522), (1781, 11766), (1961, 10686), (2067, 10138), (2886, 7261), (3562, 5883), (3922, 5343), (4134, 5069)]