81426460

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{2153}}^1$

素因数の和:2254

約数の個数: 48

約数和(自身を含む): 179488512

約数和(自身を除く): 98062052

約数列:

[1, 2, 4, 5, 10, 20, 31, 61, 62, 122, 124, 155, 244, 305, 310, 610, 620, 1220, 1891, 2153, 3782, 4306, 7564, 8612, 9455, 10765, 18910, 21530, 37820, 43060, 66743, 131333, 133486, 262666, 266972, 333715, 525332, 656665, 667430, 1313330, 1334860, 2626660, 4071323, 8142646, 16285292, 20356615, 40713230, 81426460]

約数ペア:

[(1, 81426460), (2, 40713230), (4, 20356615), (5, 16285292), (10, 8142646), (20, 4071323), (31, 2626660), (61, 1334860), (62, 1313330), (122, 667430), (124, 656665), (155, 525332), (244, 333715), (305, 266972), (310, 262666), (610, 133486), (620, 131333), (1220, 66743), (1891, 43060), (2153, 37820), (3782, 21530), (4306, 18910), (7564, 10765), (8612, 9455)]