28928680

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^2\times {\mathrm{43}}^1\times {\mathrm{139}}^1$

素因数の和:215

約数の個数: 96

約数和(自身を含む): 73735200

約数和(自身を除く): 44806520

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 43, 44, 55, 86, 88, 110, 121, 139, 172, 215, 220, 242, 278, 344, 430, 440, 473, 484, 556, 605, 695, 860, 946, 968, 1112, 1210, 1390, 1529, 1720, 1892, 2365, 2420, 2780, 3058, 3784, 4730, 4840, 5203, 5560, 5977, 6116, 7645, 9460, 10406, 11954, 12232, 15290, 16819, 18920, 20812, 23908, 26015, 29885, 30580, 33638, 41624, 47816, 52030, 59770, 61160, 65747, 67276, 84095, 104060, 119540, 131494, 134552, 168190, 208120, 239080, 262988, 328735, 336380, 525976, 657470, 672760, 723217, 1314940, 1446434, 2629880, 2892868, 3616085, 5785736, 7232170, 14464340, 28928680]

約数ペア:

[(1, 28928680), (2, 14464340), (4, 7232170), (5, 5785736), (8, 3616085), (10, 2892868), (11, 2629880), (20, 1446434), (22, 1314940), (40, 723217), (43, 672760), (44, 657470), (55, 525976), (86, 336380), (88, 328735), (110, 262988), (121, 239080), (139, 208120), (172, 168190), (215, 134552), (220, 131494), (242, 119540), (278, 104060), (344, 84095), (430, 67276), (440, 65747), (473, 61160), (484, 59770), (556, 52030), (605, 47816), (695, 41624), (860, 33638), (946, 30580), (968, 29885), (1112, 26015), (1210, 23908), (1390, 20812), (1529, 18920), (1720, 16819), (1892, 15290), (2365, 12232), (2420, 11954), (2780, 10406), (3058, 9460), (3784, 7645), (4730, 6116), (4840, 5977), (5203, 5560)]