81666400

素因数分解:

$2^5\times 5^2\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{89}}^1$

素因数の和:177

約数の個数: 144

約数和(自身を含む): 213736320

約数和(自身を除く): 132069920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 31, 32, 37, 40, 50, 62, 74, 80, 89, 100, 124, 148, 155, 160, 178, 185, 200, 248, 296, 310, 356, 370, 400, 445, 496, 592, 620, 712, 740, 775, 800, 890, 925, 992, 1147, 1184, 1240, 1424, 1480, 1550, 1780, 1850, 2225, 2294, 2480, 2759, 2848, 2960, 3100, 3293, 3560, 3700, 4450, 4588, 4960, 5518, 5735, 5920, 6200, 6586, 7120, 7400, 8900, 9176, 11036, 11470, 12400, 13172, 13795, 14240, 14800, 16465, 17800, 18352, 22072, 22940, 24800, 26344, 27590, 28675, 29600, 32930, 35600, 36704, 44144, 45880, 52688, 55180, 57350, 65860, 68975, 71200, 82325, 88288, 91760, 102083, 105376, 110360, 114700, 131720, 137950, 164650, 183520, 204166, 220720, 229400, 263440, 275900, 329300, 408332, 441440, 458800, 510415, 526880, 551800, 658600, 816664, 917600, 1020830, 1103600, 1317200, 1633328, 2041660, 2207200, 2552075, 2634400, 3266656, 4083320, 5104150, 8166640, 10208300, 16333280, 20416600, 40833200, 81666400]

約数ペア:

[(1, 81666400), (2, 40833200), (4, 20416600), (5, 16333280), (8, 10208300), (10, 8166640), (16, 5104150), (20, 4083320), (25, 3266656), (31, 2634400), (32, 2552075), (37, 2207200), (40, 2041660), (50, 1633328), (62, 1317200), (74, 1103600), (80, 1020830), (89, 917600), (100, 816664), (124, 658600), (148, 551800), (155, 526880), (160, 510415), (178, 458800), (185, 441440), (200, 408332), (248, 329300), (296, 275900), (310, 263440), (356, 229400), (370, 220720), (400, 204166), (445, 183520), (496, 164650), (592, 137950), (620, 131720), (712, 114700), (740, 110360), (775, 105376), (800, 102083), (890, 91760), (925, 88288), (992, 82325), (1147, 71200), (1184, 68975), (1240, 65860), (1424, 57350), (1480, 55180), (1550, 52688), (1780, 45880), (1850, 44144), (2225, 36704), (2294, 35600), (2480, 32930), (2759, 29600), (2848, 28675), (2960, 27590), (3100, 26344), (3293, 24800), (3560, 22940), (3700, 22072), (4450, 18352), (4588, 17800), (4960, 16465), (5518, 14800), (5735, 14240), (5920, 13795), (6200, 13172), (6586, 12400), (7120, 11470), (7400, 11036), (8900, 9176)]