81865420

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{1451}}^1$

素因数の和:1511

約数の個数: 96

約数和(自身を含む): 218566656

約数和(自身を除く): 136701236

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 31, 35, 52, 62, 65, 70, 91, 124, 130, 140, 155, 182, 217, 260, 310, 364, 403, 434, 455, 620, 806, 868, 910, 1085, 1451, 1612, 1820, 2015, 2170, 2821, 2902, 4030, 4340, 5642, 5804, 7255, 8060, 10157, 11284, 14105, 14510, 18863, 20314, 28210, 29020, 37726, 40628, 44981, 50785, 56420, 75452, 89962, 94315, 101570, 132041, 179924, 188630, 203140, 224905, 264082, 314867, 377260, 449810, 528164, 584753, 629734, 660205, 899620, 1169506, 1259468, 1320410, 1574335, 2339012, 2640820, 2923765, 3148670, 4093271, 5847530, 6297340, 8186542, 11695060, 16373084, 20466355, 40932710, 81865420]

約数ペア:

[(1, 81865420), (2, 40932710), (4, 20466355), (5, 16373084), (7, 11695060), (10, 8186542), (13, 6297340), (14, 5847530), (20, 4093271), (26, 3148670), (28, 2923765), (31, 2640820), (35, 2339012), (52, 1574335), (62, 1320410), (65, 1259468), (70, 1169506), (91, 899620), (124, 660205), (130, 629734), (140, 584753), (155, 528164), (182, 449810), (217, 377260), (260, 314867), (310, 264082), (364, 224905), (403, 203140), (434, 188630), (455, 179924), (620, 132041), (806, 101570), (868, 94315), (910, 89962), (1085, 75452), (1451, 56420), (1612, 50785), (1820, 44981), (2015, 40628), (2170, 37726), (2821, 29020), (2902, 28210), (4030, 20314), (4340, 18863), (5642, 14510), (5804, 14105), (7255, 11284), (8060, 10157)]