81204500

素因数分解:

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

素因数の和:107

約数の個数: 108

約数和(自身を含む): 198437148

約数和(自身を除く): 117232648

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 31, 50, 52, 62, 65, 100, 124, 125, 130, 155, 169, 250, 260, 310, 325, 338, 403, 500, 620, 650, 676, 775, 806, 845, 961, 1300, 1550, 1612, 1625, 1690, 1922, 2015, 3100, 3250, 3380, 3844, 3875, 4030, 4225, 4805, 5239, 6500, 7750, 8060, 8450, 9610, 10075, 10478, 12493, 15500, 16900, 19220, 20150, 20956, 21125, 24025, 24986, 26195, 40300, 42250, 48050, 49972, 50375, 52390, 62465, 84500, 96100, 100750, 104780, 120125, 124930, 130975, 162409, 201500, 240250, 249860, 261950, 312325, 324818, 480500, 523900, 624650, 649636, 654875, 812045, 1249300, 1309750, 1561625, 1624090, 2619500, 3123250, 3248180, 4060225, 6246500, 8120450, 16240900, 20301125, 40602250, 81204500]

約数ペア:

[(1, 81204500), (2, 40602250), (4, 20301125), (5, 16240900), (10, 8120450), (13, 6246500), (20, 4060225), (25, 3248180), (26, 3123250), (31, 2619500), (50, 1624090), (52, 1561625), (62, 1309750), (65, 1249300), (100, 812045), (124, 654875), (125, 649636), (130, 624650), (155, 523900), (169, 480500), (250, 324818), (260, 312325), (310, 261950), (325, 249860), (338, 240250), (403, 201500), (500, 162409), (620, 130975), (650, 124930), (676, 120125), (775, 104780), (806, 100750), (845, 96100), (961, 84500), (1300, 62465), (1550, 52390), (1612, 50375), (1625, 49972), (1690, 48050), (1922, 42250), (2015, 40300), (3100, 26195), (3250, 24986), (3380, 24025), (3844, 21125), (3875, 20956), (4030, 20150), (4225, 19220), (4805, 16900), (5239, 15500), (6500, 12493), (7750, 10478), (8060, 10075), (8450, 9610)]