81256140

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{64489}}^1$

素因数の和:64511

約数の個数: 72

約数和(自身を含む): 281692320

約数和(自身を除く): 200436180

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 84, 90, 105, 126, 140, 180, 210, 252, 315, 420, 630, 1260, 64489, 128978, 193467, 257956, 322445, 386934, 451423, 580401, 644890, 773868, 902846, 967335, 1160802, 1289780, 1354269, 1805692, 1934670, 2257115, 2321604, 2708538, 2902005, 3869340, 4062807, 4514230, 5417076, 5804010, 6771345, 8125614, 9028460, 11608020, 13542690, 16251228, 20314035, 27085380, 40628070, 81256140]

約数ペア:

[(1, 81256140), (2, 40628070), (3, 27085380), (4, 20314035), (5, 16251228), (6, 13542690), (7, 11608020), (9, 9028460), (10, 8125614), (12, 6771345), (14, 5804010), (15, 5417076), (18, 4514230), (20, 4062807), (21, 3869340), (28, 2902005), (30, 2708538), (35, 2321604), (36, 2257115), (42, 1934670), (45, 1805692), (60, 1354269), (63, 1289780), (70, 1160802), (84, 967335), (90, 902846), (105, 773868), (126, 644890), (140, 580401), (180, 451423), (210, 386934), (252, 322445), (315, 257956), (420, 193467), (630, 128978), (1260, 64489)]