21308207955

素因数分解:

$3^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{127}}^1\times {\mathrm{257}}^1\times {\mathrm{613}}^1$

素因数の和:1076

約数の個数: 64

約数和(自身を含む): 35038199808

約数和(自身を除く): 13729991853

約数列:

[1, 3, 5, 15, 71, 127, 213, 257, 355, 381, 613, 635, 771, 1065, 1285, 1839, 1905, 3065, 3855, 9017, 9195, 18247, 27051, 32639, 43523, 45085, 54741, 77851, 91235, 97917, 130569, 135255, 157541, 163195, 217615, 233553, 273705, 389255, 472623, 489585, 652845, 787705, 1167765, 2317369, 2363115, 5527421, 6952107, 11185411, 11586845, 16582263, 20007707, 27637105, 33556233, 34760535, 55927055, 60023121, 82911315, 100038535, 167781165, 300115605, 1420547197, 4261641591, 7102735985, 21308207955]

約数ペア:

[(1, 21308207955), (3, 7102735985), (5, 4261641591), (15, 1420547197), (71, 300115605), (127, 167781165), (213, 100038535), (257, 82911315), (355, 60023121), (381, 55927055), (613, 34760535), (635, 33556233), (771, 27637105), (1065, 20007707), (1285, 16582263), (1839, 11586845), (1905, 11185411), (3065, 6952107), (3855, 5527421), (9017, 2363115), (9195, 2317369), (18247, 1167765), (27051, 787705), (32639, 652845), (43523, 489585), (45085, 472623), (54741, 389255), (77851, 273705), (91235, 233553), (97917, 217615), (130569, 163195), (135255, 157541)]