81871000

素因数分解:

$2^3\times 5^3\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{139}}^1$

素因数の和:210

約数の個数: 128

約数和(自身を含む): 209664000

約数和(自身を除く): 127793000

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 25, 31, 38, 40, 50, 62, 76, 95, 100, 124, 125, 139, 152, 155, 190, 200, 248, 250, 278, 310, 380, 475, 500, 556, 589, 620, 695, 760, 775, 950, 1000, 1112, 1178, 1240, 1390, 1550, 1900, 2356, 2375, 2641, 2780, 2945, 3100, 3475, 3800, 3875, 4309, 4712, 4750, 5282, 5560, 5890, 6200, 6950, 7750, 8618, 9500, 10564, 11780, 13205, 13900, 14725, 15500, 17236, 17375, 19000, 21128, 21545, 23560, 26410, 27800, 29450, 31000, 34472, 34750, 43090, 52820, 58900, 66025, 69500, 73625, 81871, 86180, 105640, 107725, 117800, 132050, 139000, 147250, 163742, 172360, 215450, 264100, 294500, 327484, 330125, 409355, 430900, 528200, 538625, 589000, 654968, 660250, 818710, 861800, 1077250, 1320500, 1637420, 2046775, 2154500, 2641000, 3274840, 4093550, 4309000, 8187100, 10233875, 16374200, 20467750, 40935500, 81871000]

約数ペア:

[(1, 81871000), (2, 40935500), (4, 20467750), (5, 16374200), (8, 10233875), (10, 8187100), (19, 4309000), (20, 4093550), (25, 3274840), (31, 2641000), (38, 2154500), (40, 2046775), (50, 1637420), (62, 1320500), (76, 1077250), (95, 861800), (100, 818710), (124, 660250), (125, 654968), (139, 589000), (152, 538625), (155, 528200), (190, 430900), (200, 409355), (248, 330125), (250, 327484), (278, 294500), (310, 264100), (380, 215450), (475, 172360), (500, 163742), (556, 147250), (589, 139000), (620, 132050), (695, 117800), (760, 107725), (775, 105640), (950, 86180), (1000, 81871), (1112, 73625), (1178, 69500), (1240, 66025), (1390, 58900), (1550, 52820), (1900, 43090), (2356, 34750), (2375, 34472), (2641, 31000), (2780, 29450), (2945, 27800), (3100, 26410), (3475, 23560), (3800, 21545), (3875, 21128), (4309, 19000), (4712, 17375), (4750, 17236), (5282, 15500), (5560, 14725), (5890, 13900), (6200, 13205), (6950, 11780), (7750, 10564), (8618, 9500)]