21528180

素因数分解:

$2^2\times 3^4\times 5^1\times {\mathrm{97}}^1\times {\mathrm{137}}^1$

素因数の和:255

約数の個数: 120

約数和(自身を含む): 68728968

約数和(自身を除く): 47200788

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 45, 54, 60, 81, 90, 97, 108, 135, 137, 162, 180, 194, 270, 274, 291, 324, 388, 405, 411, 485, 540, 548, 582, 685, 810, 822, 873, 970, 1164, 1233, 1370, 1455, 1620, 1644, 1746, 1940, 2055, 2466, 2619, 2740, 2910, 3492, 3699, 4110, 4365, 4932, 5238, 5820, 6165, 7398, 7857, 8220, 8730, 10476, 11097, 12330, 13095, 13289, 14796, 15714, 17460, 18495, 22194, 24660, 26190, 26578, 31428, 36990, 39285, 39867, 44388, 52380, 53156, 55485, 66445, 73980, 78570, 79734, 110970, 119601, 132890, 157140, 159468, 199335, 221940, 239202, 265780, 358803, 398670, 478404, 598005, 717606, 797340, 1076409, 1196010, 1435212, 1794015, 2152818, 2392020, 3588030, 4305636, 5382045, 7176060, 10764090, 21528180]

約数ペア:

[(1, 21528180), (2, 10764090), (3, 7176060), (4, 5382045), (5, 4305636), (6, 3588030), (9, 2392020), (10, 2152818), (12, 1794015), (15, 1435212), (18, 1196010), (20, 1076409), (27, 797340), (30, 717606), (36, 598005), (45, 478404), (54, 398670), (60, 358803), (81, 265780), (90, 239202), (97, 221940), (108, 199335), (135, 159468), (137, 157140), (162, 132890), (180, 119601), (194, 110970), (270, 79734), (274, 78570), (291, 73980), (324, 66445), (388, 55485), (405, 53156), (411, 52380), (485, 44388), (540, 39867), (548, 39285), (582, 36990), (685, 31428), (810, 26578), (822, 26190), (873, 24660), (970, 22194), (1164, 18495), (1233, 17460), (1370, 15714), (1455, 14796), (1620, 13289), (1644, 13095), (1746, 12330), (1940, 11097), (2055, 10476), (2466, 8730), (2619, 8220), (2740, 7857), (2910, 7398), (3492, 6165), (3699, 5820), (4110, 5238), (4365, 4932)]