261161360

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^2\times {\mathrm{43}}^1\times {\mathrm{79}}^1$

素因数の和:197

約数の個数: 120

約数和(自身を含む): 650136960

約数和(自身を除く): 388975600

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 43, 62, 79, 80, 86, 124, 155, 158, 172, 215, 248, 310, 316, 344, 395, 430, 496, 620, 632, 688, 790, 860, 961, 1240, 1264, 1333, 1580, 1720, 1922, 2449, 2480, 2666, 3160, 3397, 3440, 3844, 4805, 4898, 5332, 6320, 6665, 6794, 7688, 9610, 9796, 10664, 12245, 13330, 13588, 15376, 16985, 19220, 19592, 21328, 24490, 26660, 27176, 33970, 38440, 39184, 41323, 48980, 53320, 54352, 67940, 75919, 76880, 82646, 97960, 105307, 106640, 135880, 151838, 165292, 195920, 206615, 210614, 271760, 303676, 330584, 379595, 413230, 421228, 526535, 607352, 661168, 759190, 826460, 842456, 1053070, 1214704, 1518380, 1652920, 1684912, 2106140, 3036760, 3264517, 3305840, 4212280, 6073520, 6529034, 8424560, 13058068, 16322585, 26116136, 32645170, 52232272, 65290340, 130580680, 261161360]

約数ペア:

[(1, 261161360), (2, 130580680), (4, 65290340), (5, 52232272), (8, 32645170), (10, 26116136), (16, 16322585), (20, 13058068), (31, 8424560), (40, 6529034), (43, 6073520), (62, 4212280), (79, 3305840), (80, 3264517), (86, 3036760), (124, 2106140), (155, 1684912), (158, 1652920), (172, 1518380), (215, 1214704), (248, 1053070), (310, 842456), (316, 826460), (344, 759190), (395, 661168), (430, 607352), (496, 526535), (620, 421228), (632, 413230), (688, 379595), (790, 330584), (860, 303676), (961, 271760), (1240, 210614), (1264, 206615), (1333, 195920), (1580, 165292), (1720, 151838), (1922, 135880), (2449, 106640), (2480, 105307), (2666, 97960), (3160, 82646), (3397, 76880), (3440, 75919), (3844, 67940), (4805, 54352), (4898, 53320), (5332, 48980), (6320, 41323), (6665, 39184), (6794, 38440), (7688, 33970), (9610, 27176), (9796, 26660), (10664, 24490), (12245, 21328), (13330, 19592), (13588, 19220), (15376, 16985)]