81271460

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{2789}}^1$

素因数の和:2876

約数の個数: 48

約数和(自身を含む): 179988480

約数和(自身を除く): 98717020

約数列:

[1, 2, 4, 5, 10, 20, 31, 47, 62, 94, 124, 155, 188, 235, 310, 470, 620, 940, 1457, 2789, 2914, 5578, 5828, 7285, 11156, 13945, 14570, 27890, 29140, 55780, 86459, 131083, 172918, 262166, 345836, 432295, 524332, 655415, 864590, 1310830, 1729180, 2621660, 4063573, 8127146, 16254292, 20317865, 40635730, 81271460]

約数ペア:

[(1, 81271460), (2, 40635730), (4, 20317865), (5, 16254292), (10, 8127146), (20, 4063573), (31, 2621660), (47, 1729180), (62, 1310830), (94, 864590), (124, 655415), (155, 524332), (188, 432295), (235, 345836), (310, 262166), (470, 172918), (620, 131083), (940, 86459), (1457, 55780), (2789, 29140), (2914, 27890), (5578, 14570), (5828, 13945), (7285, 11156)]