81277040

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{2521}}^1$

素因数の和:2578

約数の個数: 80

約数和(自身を含む): 210153216

約数和(自身を除く): 128876176

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 31, 40, 52, 62, 65, 80, 104, 124, 130, 155, 208, 248, 260, 310, 403, 496, 520, 620, 806, 1040, 1240, 1612, 2015, 2480, 2521, 3224, 4030, 5042, 6448, 8060, 10084, 12605, 16120, 20168, 25210, 32240, 32773, 40336, 50420, 65546, 78151, 100840, 131092, 156302, 163865, 201680, 262184, 312604, 327730, 390755, 524368, 625208, 655460, 781510, 1015963, 1250416, 1310920, 1563020, 2031926, 2621840, 3126040, 4063852, 5079815, 6252080, 8127704, 10159630, 16255408, 20319260, 40638520, 81277040]

約数ペア:

[(1, 81277040), (2, 40638520), (4, 20319260), (5, 16255408), (8, 10159630), (10, 8127704), (13, 6252080), (16, 5079815), (20, 4063852), (26, 3126040), (31, 2621840), (40, 2031926), (52, 1563020), (62, 1310920), (65, 1250416), (80, 1015963), (104, 781510), (124, 655460), (130, 625208), (155, 524368), (208, 390755), (248, 327730), (260, 312604), (310, 262184), (403, 201680), (496, 163865), (520, 156302), (620, 131092), (806, 100840), (1040, 78151), (1240, 65546), (1612, 50420), (2015, 40336), (2480, 32773), (2521, 32240), (3224, 25210), (4030, 20168), (5042, 16120), (6448, 12605), (8060, 10084)]