208826540

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{1993}}^1$

素因数の和:2059

約数の個数: 72

約数和(自身を含む): 490428288

約数和(自身を除く): 281601748

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 31, 52, 62, 65, 124, 130, 155, 169, 260, 310, 338, 403, 620, 676, 806, 845, 1612, 1690, 1993, 2015, 3380, 3986, 4030, 5239, 7972, 8060, 9965, 10478, 19930, 20956, 25909, 26195, 39860, 51818, 52390, 61783, 103636, 104780, 123566, 129545, 247132, 259090, 308915, 336817, 518180, 617830, 673634, 803179, 1235660, 1347268, 1606358, 1684085, 3212716, 3368170, 4015895, 6736340, 8031790, 10441327, 16063580, 20882654, 41765308, 52206635, 104413270, 208826540]

約数ペア:

[(1, 208826540), (2, 104413270), (4, 52206635), (5, 41765308), (10, 20882654), (13, 16063580), (20, 10441327), (26, 8031790), (31, 6736340), (52, 4015895), (62, 3368170), (65, 3212716), (124, 1684085), (130, 1606358), (155, 1347268), (169, 1235660), (260, 803179), (310, 673634), (338, 617830), (403, 518180), (620, 336817), (676, 308915), (806, 259090), (845, 247132), (1612, 129545), (1690, 123566), (1993, 104780), (2015, 103636), (3380, 61783), (3986, 52390), (4030, 51818), (5239, 39860), (7972, 26195), (8060, 25909), (9965, 20956), (10478, 19930)]