21612880

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{241}}^1$

素因数の和:332

約数の個数: 80

約数和(自身を含む): 54014400

約数和(自身を除く): 32401520

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 59, 76, 80, 95, 118, 152, 190, 236, 241, 295, 304, 380, 472, 482, 590, 760, 944, 964, 1121, 1180, 1205, 1520, 1928, 2242, 2360, 2410, 3856, 4484, 4579, 4720, 4820, 5605, 8968, 9158, 9640, 11210, 14219, 17936, 18316, 19280, 22420, 22895, 28438, 36632, 44840, 45790, 56876, 71095, 73264, 89680, 91580, 113752, 142190, 183160, 227504, 270161, 284380, 366320, 540322, 568760, 1080644, 1137520, 1350805, 2161288, 2701610, 4322576, 5403220, 10806440, 21612880]

約数ペア:

[(1, 21612880), (2, 10806440), (4, 5403220), (5, 4322576), (8, 2701610), (10, 2161288), (16, 1350805), (19, 1137520), (20, 1080644), (38, 568760), (40, 540322), (59, 366320), (76, 284380), (80, 270161), (95, 227504), (118, 183160), (152, 142190), (190, 113752), (236, 91580), (241, 89680), (295, 73264), (304, 71095), (380, 56876), (472, 45790), (482, 44840), (590, 36632), (760, 28438), (944, 22895), (964, 22420), (1121, 19280), (1180, 18316), (1205, 17936), (1520, 14219), (1928, 11210), (2242, 9640), (2360, 9158), (2410, 8968), (3856, 5605), (4484, 4820), (4579, 4720)]