20809308

素因数分解:

$2^2\times 3^1\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{331}}^1$

素因数の和:395

約数の個数: 72

約数和(自身を含む): 54437376

約数和(自身を除く): 33628068

約数列:

[1, 2, 3, 4, 6, 12, 13, 26, 31, 39, 52, 62, 78, 93, 124, 156, 169, 186, 331, 338, 372, 403, 507, 662, 676, 806, 993, 1014, 1209, 1324, 1612, 1986, 2028, 2418, 3972, 4303, 4836, 5239, 8606, 10261, 10478, 12909, 15717, 17212, 20522, 20956, 25818, 30783, 31434, 41044, 51636, 55939, 61566, 62868, 111878, 123132, 133393, 167817, 223756, 266786, 335634, 400179, 533572, 671268, 800358, 1600716, 1734109, 3468218, 5202327, 6936436, 10404654, 20809308]

約数ペア:

[(1, 20809308), (2, 10404654), (3, 6936436), (4, 5202327), (6, 3468218), (12, 1734109), (13, 1600716), (26, 800358), (31, 671268), (39, 533572), (52, 400179), (62, 335634), (78, 266786), (93, 223756), (124, 167817), (156, 133393), (169, 123132), (186, 111878), (331, 62868), (338, 61566), (372, 55939), (403, 51636), (507, 41044), (662, 31434), (676, 30783), (806, 25818), (993, 20956), (1014, 20522), (1209, 17212), (1324, 15717), (1612, 12909), (1986, 10478), (2028, 10261), (2418, 8606), (3972, 5239), (4303, 4836)]