20358945

素因数分解:

$3^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{2957}}^1$

素因数の和:2991

約数の個数: 40

約数和(自身を含む): 38655144

約数和(自身を除く): 18296199

約数列:

[1, 3, 5, 9, 15, 17, 27, 45, 51, 81, 85, 135, 153, 255, 405, 459, 765, 1377, 2295, 2957, 6885, 8871, 14785, 26613, 44355, 50269, 79839, 133065, 150807, 239517, 251345, 399195, 452421, 754035, 1197585, 1357263, 2262105, 4071789, 6786315, 20358945]

約数ペア:

[(1, 20358945), (3, 6786315), (5, 4071789), (9, 2262105), (15, 1357263), (17, 1197585), (27, 754035), (45, 452421), (51, 399195), (81, 251345), (85, 239517), (135, 150807), (153, 133065), (255, 79839), (405, 50269), (459, 44355), (765, 26613), (1377, 14785), (2295, 8871), (2957, 6885)]