20938900

素因数分解:

$2^2\times 5^2\times {\mathrm{17}}^1\times {\mathrm{109}}^1\times {\mathrm{113}}^1$

素因数の和:253

約数の個数: 72

約数和(自身を含む): 48981240

約数和(自身を除く): 28042340

約数列:

[1, 2, 4, 5, 10, 17, 20, 25, 34, 50, 68, 85, 100, 109, 113, 170, 218, 226, 340, 425, 436, 452, 545, 565, 850, 1090, 1130, 1700, 1853, 1921, 2180, 2260, 2725, 2825, 3706, 3842, 5450, 5650, 7412, 7684, 9265, 9605, 10900, 11300, 12317, 18530, 19210, 24634, 37060, 38420, 46325, 48025, 49268, 61585, 92650, 96050, 123170, 185300, 192100, 209389, 246340, 307925, 418778, 615850, 837556, 1046945, 1231700, 2093890, 4187780, 5234725, 10469450, 20938900]

約数ペア:

[(1, 20938900), (2, 10469450), (4, 5234725), (5, 4187780), (10, 2093890), (17, 1231700), (20, 1046945), (25, 837556), (34, 615850), (50, 418778), (68, 307925), (85, 246340), (100, 209389), (109, 192100), (113, 185300), (170, 123170), (218, 96050), (226, 92650), (340, 61585), (425, 49268), (436, 48025), (452, 46325), (545, 38420), (565, 37060), (850, 24634), (1090, 19210), (1130, 18530), (1700, 12317), (1853, 11300), (1921, 10900), (2180, 9605), (2260, 9265), (2725, 7684), (2825, 7412), (3706, 5650), (3842, 5450)]