20998264

素因数分解:

$2^3\times 7^2\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{137}}^1$

素因数の和:197

約数の個数: 96

約数和(自身を含む): 50971680

約数和(自身を除く): 29973416

約数列:

[1, 2, 4, 7, 8, 14, 17, 23, 28, 34, 46, 49, 56, 68, 92, 98, 119, 136, 137, 161, 184, 196, 238, 274, 322, 391, 392, 476, 548, 644, 782, 833, 952, 959, 1096, 1127, 1288, 1564, 1666, 1918, 2254, 2329, 2737, 3128, 3151, 3332, 3836, 4508, 4658, 5474, 6302, 6664, 6713, 7672, 9016, 9316, 10948, 12604, 13426, 16303, 18632, 19159, 21896, 22057, 25208, 26852, 32606, 38318, 44114, 53567, 53704, 65212, 76636, 88228, 107134, 114121, 130424, 153272, 154399, 176456, 214268, 228242, 308798, 374969, 428536, 456484, 617596, 749938, 912968, 1235192, 1499876, 2624783, 2999752, 5249566, 10499132, 20998264]

約数ペア:

[(1, 20998264), (2, 10499132), (4, 5249566), (7, 2999752), (8, 2624783), (14, 1499876), (17, 1235192), (23, 912968), (28, 749938), (34, 617596), (46, 456484), (49, 428536), (56, 374969), (68, 308798), (92, 228242), (98, 214268), (119, 176456), (136, 154399), (137, 153272), (161, 130424), (184, 114121), (196, 107134), (238, 88228), (274, 76636), (322, 65212), (391, 53704), (392, 53567), (476, 44114), (548, 38318), (644, 32606), (782, 26852), (833, 25208), (952, 22057), (959, 21896), (1096, 19159), (1127, 18632), (1288, 16303), (1564, 13426), (1666, 12604), (1918, 10948), (2254, 9316), (2329, 9016), (2737, 7672), (3128, 6713), (3151, 6664), (3332, 6302), (3836, 5474), (4508, 4658)]