81040820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{263}}^1$

素因数の和:381

約数の個数: 96

約数和(自身を含む): 204374016

約数和(自身を除く): 123333196

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 31, 35, 62, 70, 71, 124, 140, 142, 155, 217, 263, 284, 310, 355, 434, 497, 526, 620, 710, 868, 994, 1052, 1085, 1315, 1420, 1841, 1988, 2170, 2201, 2485, 2630, 3682, 4340, 4402, 4970, 5260, 7364, 8153, 8804, 9205, 9940, 11005, 15407, 16306, 18410, 18673, 22010, 30814, 32612, 36820, 37346, 40765, 44020, 57071, 61628, 74692, 77035, 81530, 93365, 114142, 130711, 154070, 163060, 186730, 228284, 261422, 285355, 308140, 373460, 522844, 570710, 578863, 653555, 1141420, 1157726, 1307110, 2315452, 2614220, 2894315, 4052041, 5788630, 8104082, 11577260, 16208164, 20260205, 40520410, 81040820]

約数ペア:

[(1, 81040820), (2, 40520410), (4, 20260205), (5, 16208164), (7, 11577260), (10, 8104082), (14, 5788630), (20, 4052041), (28, 2894315), (31, 2614220), (35, 2315452), (62, 1307110), (70, 1157726), (71, 1141420), (124, 653555), (140, 578863), (142, 570710), (155, 522844), (217, 373460), (263, 308140), (284, 285355), (310, 261422), (355, 228284), (434, 186730), (497, 163060), (526, 154070), (620, 130711), (710, 114142), (868, 93365), (994, 81530), (1052, 77035), (1085, 74692), (1315, 61628), (1420, 57071), (1841, 44020), (1988, 40765), (2170, 37346), (2201, 36820), (2485, 32612), (2630, 30814), (3682, 22010), (4340, 18673), (4402, 18410), (4970, 16306), (5260, 15407), (7364, 11005), (8153, 9940), (8804, 9205)]