21720528

素因数分解:

$2^4\times 3^3\times {\mathrm{137}}^1\times {\mathrm{367}}^1$

素因数の和:521

約数の個数: 80

約数和(自身を含む): 62972160

約数和(自身を除く): 41251632

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 27, 36, 48, 54, 72, 108, 137, 144, 216, 274, 367, 411, 432, 548, 734, 822, 1096, 1101, 1233, 1468, 1644, 2192, 2202, 2466, 2936, 3288, 3303, 3699, 4404, 4932, 5872, 6576, 6606, 7398, 8808, 9864, 9909, 13212, 14796, 17616, 19728, 19818, 26424, 29592, 39636, 50279, 52848, 59184, 79272, 100558, 150837, 158544, 201116, 301674, 402232, 452511, 603348, 804464, 905022, 1206696, 1357533, 1810044, 2413392, 2715066, 3620088, 5430132, 7240176, 10860264, 21720528]

約数ペア:

[(1, 21720528), (2, 10860264), (3, 7240176), (4, 5430132), (6, 3620088), (8, 2715066), (9, 2413392), (12, 1810044), (16, 1357533), (18, 1206696), (24, 905022), (27, 804464), (36, 603348), (48, 452511), (54, 402232), (72, 301674), (108, 201116), (137, 158544), (144, 150837), (216, 100558), (274, 79272), (367, 59184), (411, 52848), (432, 50279), (548, 39636), (734, 29592), (822, 26424), (1096, 19818), (1101, 19728), (1233, 17616), (1468, 14796), (1644, 13212), (2192, 9909), (2202, 9864), (2466, 8808), (2936, 7398), (3288, 6606), (3303, 6576), (3699, 5872), (4404, 4932)]