21531132

素因数分解:

$2^2\times 3^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{1987}}^1$

素因数の和:2047

約数の個数: 72

約数和(自身を含む): 63679616

約数和(自身を除く): 42148484

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 28, 36, 42, 43, 63, 84, 86, 126, 129, 172, 252, 258, 301, 387, 516, 602, 774, 903, 1204, 1548, 1806, 1987, 2709, 3612, 3974, 5418, 5961, 7948, 10836, 11922, 13909, 17883, 23844, 27818, 35766, 41727, 55636, 71532, 83454, 85441, 125181, 166908, 170882, 250362, 256323, 341764, 500724, 512646, 598087, 768969, 1025292, 1196174, 1537938, 1794261, 2392348, 3075876, 3588522, 5382783, 7177044, 10765566, 21531132]

約数ペア:

[(1, 21531132), (2, 10765566), (3, 7177044), (4, 5382783), (6, 3588522), (7, 3075876), (9, 2392348), (12, 1794261), (14, 1537938), (18, 1196174), (21, 1025292), (28, 768969), (36, 598087), (42, 512646), (43, 500724), (63, 341764), (84, 256323), (86, 250362), (126, 170882), (129, 166908), (172, 125181), (252, 85441), (258, 83454), (301, 71532), (387, 55636), (516, 41727), (602, 35766), (774, 27818), (903, 23844), (1204, 17883), (1548, 13909), (1806, 11922), (1987, 10836), (2709, 7948), (3612, 5961), (3974, 5418)]