20578245

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^2\times {\mathrm{47}}^1\times {\mathrm{101}}^1$

素因数の和:190

約数の個数: 48

約数和(自身を含む): 36073728

約数和(自身を除く): 15495483

約数列:

[1, 3, 5, 15, 17, 47, 51, 85, 101, 141, 235, 255, 289, 303, 505, 705, 799, 867, 1445, 1515, 1717, 2397, 3995, 4335, 4747, 5151, 8585, 11985, 13583, 14241, 23735, 25755, 29189, 40749, 67915, 71205, 80699, 87567, 145945, 203745, 242097, 403495, 437835, 1210485, 1371883, 4115649, 6859415, 20578245]

約数ペア:

[(1, 20578245), (3, 6859415), (5, 4115649), (15, 1371883), (17, 1210485), (47, 437835), (51, 403495), (85, 242097), (101, 203745), (141, 145945), (235, 87567), (255, 80699), (289, 71205), (303, 67915), (505, 40749), (705, 29189), (799, 25755), (867, 23735), (1445, 14241), (1515, 13583), (1717, 11985), (2397, 8585), (3995, 5151), (4335, 4747)]