81421380

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{277}}^1$

素因数の和:386

約数の個数: 144

約数和(自身を含む): 262289664

約数和(自身を除く): 180868284

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 23, 30, 36, 45, 46, 60, 69, 71, 90, 92, 115, 138, 142, 180, 207, 213, 230, 276, 277, 284, 345, 355, 414, 426, 460, 554, 639, 690, 710, 828, 831, 852, 1035, 1065, 1108, 1278, 1380, 1385, 1420, 1633, 1662, 2070, 2130, 2493, 2556, 2770, 3195, 3266, 3324, 4140, 4155, 4260, 4899, 4986, 5540, 6371, 6390, 6532, 8165, 8310, 9798, 9972, 12465, 12742, 12780, 14697, 16330, 16620, 19113, 19596, 19667, 24495, 24930, 25484, 29394, 31855, 32660, 38226, 39334, 48990, 49860, 57339, 58788, 59001, 63710, 73485, 76452, 78668, 95565, 97980, 98335, 114678, 118002, 127420, 146970, 177003, 191130, 196670, 229356, 236004, 286695, 293940, 295005, 354006, 382260, 393340, 452341, 573390, 590010, 708012, 885015, 904682, 1146780, 1180020, 1357023, 1770030, 1809364, 2261705, 2714046, 3540060, 4071069, 4523410, 5428092, 6785115, 8142138, 9046820, 13570230, 16284276, 20355345, 27140460, 40710690, 81421380]

約数ペア:

[(1, 81421380), (2, 40710690), (3, 27140460), (4, 20355345), (5, 16284276), (6, 13570230), (9, 9046820), (10, 8142138), (12, 6785115), (15, 5428092), (18, 4523410), (20, 4071069), (23, 3540060), (30, 2714046), (36, 2261705), (45, 1809364), (46, 1770030), (60, 1357023), (69, 1180020), (71, 1146780), (90, 904682), (92, 885015), (115, 708012), (138, 590010), (142, 573390), (180, 452341), (207, 393340), (213, 382260), (230, 354006), (276, 295005), (277, 293940), (284, 286695), (345, 236004), (355, 229356), (414, 196670), (426, 191130), (460, 177003), (554, 146970), (639, 127420), (690, 118002), (710, 114678), (828, 98335), (831, 97980), (852, 95565), (1035, 78668), (1065, 76452), (1108, 73485), (1278, 63710), (1380, 59001), (1385, 58788), (1420, 57339), (1633, 49860), (1662, 48990), (2070, 39334), (2130, 38226), (2493, 32660), (2556, 31855), (2770, 29394), (3195, 25484), (3266, 24930), (3324, 24495), (4140, 19667), (4155, 19596), (4260, 19113), (4899, 16620), (4986, 16330), (5540, 14697), (6371, 12780), (6390, 12742), (6532, 12465), (8165, 9972), (8310, 9798)]