217208940

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{691}}^1$

素因数の和:760

約数の個数: 144

約数和(自身を含む): 680795136

約数和(自身を除く): 463586196

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 31, 39, 52, 60, 62, 65, 78, 93, 124, 130, 155, 156, 169, 186, 195, 260, 310, 338, 372, 390, 403, 465, 507, 620, 676, 691, 780, 806, 845, 930, 1014, 1209, 1382, 1612, 1690, 1860, 2015, 2028, 2073, 2418, 2535, 2764, 3380, 3455, 4030, 4146, 4836, 5070, 5239, 6045, 6910, 8060, 8292, 8983, 10140, 10365, 10478, 12090, 13820, 15717, 17966, 20730, 20956, 21421, 24180, 26195, 26949, 31434, 35932, 41460, 42842, 44915, 52390, 53898, 62868, 64263, 78585, 85684, 89830, 104780, 107105, 107796, 116779, 128526, 134745, 157170, 179660, 214210, 233558, 257052, 269490, 278473, 314340, 321315, 350337, 428420, 467116, 538980, 556946, 583895, 642630, 700674, 835419, 1113892, 1167790, 1285260, 1392365, 1401348, 1670838, 1751685, 2335580, 2784730, 3341676, 3503370, 3620149, 4177095, 5569460, 7006740, 7240298, 8354190, 10860447, 14480596, 16708380, 18100745, 21720894, 36201490, 43441788, 54302235, 72402980, 108604470, 217208940]

約数ペア:

[(1, 217208940), (2, 108604470), (3, 72402980), (4, 54302235), (5, 43441788), (6, 36201490), (10, 21720894), (12, 18100745), (13, 16708380), (15, 14480596), (20, 10860447), (26, 8354190), (30, 7240298), (31, 7006740), (39, 5569460), (52, 4177095), (60, 3620149), (62, 3503370), (65, 3341676), (78, 2784730), (93, 2335580), (124, 1751685), (130, 1670838), (155, 1401348), (156, 1392365), (169, 1285260), (186, 1167790), (195, 1113892), (260, 835419), (310, 700674), (338, 642630), (372, 583895), (390, 556946), (403, 538980), (465, 467116), (507, 428420), (620, 350337), (676, 321315), (691, 314340), (780, 278473), (806, 269490), (845, 257052), (930, 233558), (1014, 214210), (1209, 179660), (1382, 157170), (1612, 134745), (1690, 128526), (1860, 116779), (2015, 107796), (2028, 107105), (2073, 104780), (2418, 89830), (2535, 85684), (2764, 78585), (3380, 64263), (3455, 62868), (4030, 53898), (4146, 52390), (4836, 44915), (5070, 42842), (5239, 41460), (6045, 35932), (6910, 31434), (8060, 26949), (8292, 26195), (8983, 24180), (10140, 21421), (10365, 20956), (10478, 20730), (12090, 17966), (13820, 15717)]