81563960

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{107}}^1$

素因数の和:213

約数の個数: 128

約数和(自身を含む): 209952000

約数和(自身を除く): 128388040

約数列:

[1, 2, 4, 5, 8, 10, 17, 19, 20, 34, 38, 40, 59, 68, 76, 85, 95, 107, 118, 136, 152, 170, 190, 214, 236, 295, 323, 340, 380, 428, 472, 535, 590, 646, 680, 760, 856, 1003, 1070, 1121, 1180, 1292, 1615, 1819, 2006, 2033, 2140, 2242, 2360, 2584, 3230, 3638, 4012, 4066, 4280, 4484, 5015, 5605, 6313, 6460, 7276, 8024, 8132, 8968, 9095, 10030, 10165, 11210, 12626, 12920, 14552, 16264, 18190, 19057, 20060, 20330, 22420, 25252, 31565, 34561, 36380, 38114, 40120, 40660, 44840, 50504, 63130, 69122, 72760, 76228, 81320, 95285, 107321, 119947, 126260, 138244, 152456, 172805, 190570, 214642, 239894, 252520, 276488, 345610, 381140, 429284, 479788, 536605, 599735, 691220, 762280, 858568, 959576, 1073210, 1199470, 1382440, 2039099, 2146420, 2398940, 4078198, 4292840, 4797880, 8156396, 10195495, 16312792, 20390990, 40781980, 81563960]

約数ペア:

[(1, 81563960), (2, 40781980), (4, 20390990), (5, 16312792), (8, 10195495), (10, 8156396), (17, 4797880), (19, 4292840), (20, 4078198), (34, 2398940), (38, 2146420), (40, 2039099), (59, 1382440), (68, 1199470), (76, 1073210), (85, 959576), (95, 858568), (107, 762280), (118, 691220), (136, 599735), (152, 536605), (170, 479788), (190, 429284), (214, 381140), (236, 345610), (295, 276488), (323, 252520), (340, 239894), (380, 214642), (428, 190570), (472, 172805), (535, 152456), (590, 138244), (646, 126260), (680, 119947), (760, 107321), (856, 95285), (1003, 81320), (1070, 76228), (1121, 72760), (1180, 69122), (1292, 63130), (1615, 50504), (1819, 44840), (2006, 40660), (2033, 40120), (2140, 38114), (2242, 36380), (2360, 34561), (2584, 31565), (3230, 25252), (3638, 22420), (4012, 20330), (4066, 20060), (4280, 19057), (4484, 18190), (5015, 16264), (5605, 14552), (6313, 12920), (6460, 12626), (7276, 11210), (8024, 10165), (8132, 10030), (8968, 9095)]