81705540

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{27791}}^1$

素因数の和:27817

約数の個数: 72

約数和(自身を含む): 266136192

約数和(自身を除く): 184430652

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 49, 60, 70, 84, 98, 105, 140, 147, 196, 210, 245, 294, 420, 490, 588, 735, 980, 1470, 2940, 27791, 55582, 83373, 111164, 138955, 166746, 194537, 277910, 333492, 389074, 416865, 555820, 583611, 778148, 833730, 972685, 1167222, 1361759, 1667460, 1945370, 2334444, 2723518, 2918055, 3890740, 4085277, 5447036, 5836110, 6808795, 8170554, 11672220, 13617590, 16341108, 20426385, 27235180, 40852770, 81705540]

約数ペア:

[(1, 81705540), (2, 40852770), (3, 27235180), (4, 20426385), (5, 16341108), (6, 13617590), (7, 11672220), (10, 8170554), (12, 6808795), (14, 5836110), (15, 5447036), (20, 4085277), (21, 3890740), (28, 2918055), (30, 2723518), (35, 2334444), (42, 1945370), (49, 1667460), (60, 1361759), (70, 1167222), (84, 972685), (98, 833730), (105, 778148), (140, 583611), (147, 555820), (196, 416865), (210, 389074), (245, 333492), (294, 277910), (420, 194537), (490, 166746), (588, 138955), (735, 111164), (980, 83373), (1470, 55582), (2940, 27791)]