645138520

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^2\times {\mathrm{1291}}^1$

素因数の和:1377

約数の個数: 96

約数和(自身を含む): 1616524560

約数和(自身を除く): 971386040

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 31, 40, 52, 62, 65, 104, 124, 130, 155, 248, 260, 310, 403, 520, 620, 806, 961, 1240, 1291, 1612, 1922, 2015, 2582, 3224, 3844, 4030, 4805, 5164, 6455, 7688, 8060, 9610, 10328, 12493, 12910, 16120, 16783, 19220, 24986, 25820, 33566, 38440, 40021, 49972, 51640, 62465, 67132, 80042, 83915, 99944, 124930, 134264, 160084, 167830, 200105, 249860, 320168, 335660, 400210, 499720, 520273, 671320, 800420, 1040546, 1240651, 1600840, 2081092, 2481302, 2601365, 4162184, 4962604, 5202730, 6203255, 9925208, 10405460, 12406510, 16128463, 20810920, 24813020, 32256926, 49626040, 64513852, 80642315, 129027704, 161284630, 322569260, 645138520]

約数ペア:

[(1, 645138520), (2, 322569260), (4, 161284630), (5, 129027704), (8, 80642315), (10, 64513852), (13, 49626040), (20, 32256926), (26, 24813020), (31, 20810920), (40, 16128463), (52, 12406510), (62, 10405460), (65, 9925208), (104, 6203255), (124, 5202730), (130, 4962604), (155, 4162184), (248, 2601365), (260, 2481302), (310, 2081092), (403, 1600840), (520, 1240651), (620, 1040546), (806, 800420), (961, 671320), (1240, 520273), (1291, 499720), (1612, 400210), (1922, 335660), (2015, 320168), (2582, 249860), (3224, 200105), (3844, 167830), (4030, 160084), (4805, 134264), (5164, 124930), (6455, 99944), (7688, 83915), (8060, 80042), (9610, 67132), (10328, 62465), (12493, 51640), (12910, 49972), (16120, 40021), (16783, 38440), (19220, 33566), (24986, 25820)]