81383680

素因数分解:

$2^8\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{293}}^1$

素因数の和:352

約数の個数: 144

約数和(自身を含む): 230759424

約数和(自身を除く): 149375744

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 31, 32, 35, 40, 56, 62, 64, 70, 80, 112, 124, 128, 140, 155, 160, 217, 224, 248, 256, 280, 293, 310, 320, 434, 448, 496, 560, 586, 620, 640, 868, 896, 992, 1085, 1120, 1172, 1240, 1280, 1465, 1736, 1792, 1984, 2051, 2170, 2240, 2344, 2480, 2930, 3472, 3968, 4102, 4340, 4480, 4688, 4960, 5860, 6944, 7936, 8204, 8680, 8960, 9083, 9376, 9920, 10255, 11720, 13888, 16408, 17360, 18166, 18752, 19840, 20510, 23440, 27776, 32816, 34720, 36332, 37504, 39680, 41020, 45415, 46880, 55552, 63581, 65632, 69440, 72664, 75008, 82040, 90830, 93760, 127162, 131264, 138880, 145328, 164080, 181660, 187520, 254324, 262528, 277760, 290656, 317905, 328160, 363320, 375040, 508648, 525056, 581312, 635810, 656320, 726640, 1017296, 1162624, 1271620, 1312640, 1453280, 2034592, 2325248, 2543240, 2625280, 2906560, 4069184, 5086480, 5813120, 8138368, 10172960, 11626240, 16276736, 20345920, 40691840, 81383680]

約数ペア:

[(1, 81383680), (2, 40691840), (4, 20345920), (5, 16276736), (7, 11626240), (8, 10172960), (10, 8138368), (14, 5813120), (16, 5086480), (20, 4069184), (28, 2906560), (31, 2625280), (32, 2543240), (35, 2325248), (40, 2034592), (56, 1453280), (62, 1312640), (64, 1271620), (70, 1162624), (80, 1017296), (112, 726640), (124, 656320), (128, 635810), (140, 581312), (155, 525056), (160, 508648), (217, 375040), (224, 363320), (248, 328160), (256, 317905), (280, 290656), (293, 277760), (310, 262528), (320, 254324), (434, 187520), (448, 181660), (496, 164080), (560, 145328), (586, 138880), (620, 131264), (640, 127162), (868, 93760), (896, 90830), (992, 82040), (1085, 75008), (1120, 72664), (1172, 69440), (1240, 65632), (1280, 63581), (1465, 55552), (1736, 46880), (1792, 45415), (1984, 41020), (2051, 39680), (2170, 37504), (2240, 36332), (2344, 34720), (2480, 32816), (2930, 27776), (3472, 23440), (3968, 20510), (4102, 19840), (4340, 18752), (4480, 18166), (4688, 17360), (4960, 16408), (5860, 13888), (6944, 11720), (7936, 10255), (8204, 9920), (8680, 9376), (8960, 9083)]