21060780

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{67}}^1$

素因数の和:136

約数の個数: 144

約数和(自身を含む): 66898944

約数和(自身を除く): 45838164

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 31, 39, 52, 60, 62, 65, 67, 78, 93, 124, 130, 134, 155, 156, 169, 186, 195, 201, 260, 268, 310, 335, 338, 372, 390, 402, 403, 465, 507, 620, 670, 676, 780, 804, 806, 845, 871, 930, 1005, 1014, 1209, 1340, 1612, 1690, 1742, 1860, 2010, 2015, 2028, 2077, 2418, 2535, 2613, 3380, 3484, 4020, 4030, 4154, 4355, 4836, 5070, 5226, 5239, 6045, 6231, 8060, 8308, 8710, 10140, 10385, 10452, 10478, 11323, 12090, 12462, 13065, 15717, 17420, 20770, 20956, 22646, 24180, 24924, 26130, 26195, 27001, 31155, 31434, 33969, 41540, 45292, 52260, 52390, 54002, 56615, 62310, 62868, 67938, 78585, 81003, 104780, 108004, 113230, 124620, 135005, 135876, 157170, 162006, 169845, 226460, 270010, 314340, 324012, 339690, 351013, 405015, 540020, 679380, 702026, 810030, 1053039, 1404052, 1620060, 1755065, 2106078, 3510130, 4212156, 5265195, 7020260, 10530390, 21060780]

約数ペア:

[(1, 21060780), (2, 10530390), (3, 7020260), (4, 5265195), (5, 4212156), (6, 3510130), (10, 2106078), (12, 1755065), (13, 1620060), (15, 1404052), (20, 1053039), (26, 810030), (30, 702026), (31, 679380), (39, 540020), (52, 405015), (60, 351013), (62, 339690), (65, 324012), (67, 314340), (78, 270010), (93, 226460), (124, 169845), (130, 162006), (134, 157170), (155, 135876), (156, 135005), (169, 124620), (186, 113230), (195, 108004), (201, 104780), (260, 81003), (268, 78585), (310, 67938), (335, 62868), (338, 62310), (372, 56615), (390, 54002), (402, 52390), (403, 52260), (465, 45292), (507, 41540), (620, 33969), (670, 31434), (676, 31155), (780, 27001), (804, 26195), (806, 26130), (845, 24924), (871, 24180), (930, 22646), (1005, 20956), (1014, 20770), (1209, 17420), (1340, 15717), (1612, 13065), (1690, 12462), (1742, 12090), (1860, 11323), (2010, 10478), (2015, 10452), (2028, 10385), (2077, 10140), (2418, 8710), (2535, 8308), (2613, 8060), (3380, 6231), (3484, 6045), (4020, 5239), (4030, 5226), (4154, 5070), (4355, 4836)]