21705840

素因数分解:

$2^4\times 3^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{773}}^1$

素因数の和:808

約数の個数: 160

約数和(自身を含む): 80619840

約数和(自身を除く): 58914000

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 13, 15, 16, 18, 20, 24, 26, 27, 30, 36, 39, 40, 45, 48, 52, 54, 60, 65, 72, 78, 80, 90, 104, 108, 117, 120, 130, 135, 144, 156, 180, 195, 208, 216, 234, 240, 260, 270, 312, 351, 360, 390, 432, 468, 520, 540, 585, 624, 702, 720, 773, 780, 936, 1040, 1080, 1170, 1404, 1546, 1560, 1755, 1872, 2160, 2319, 2340, 2808, 3092, 3120, 3510, 3865, 4638, 4680, 5616, 6184, 6957, 7020, 7730, 9276, 9360, 10049, 11595, 12368, 13914, 14040, 15460, 18552, 20098, 20871, 23190, 27828, 28080, 30147, 30920, 34785, 37104, 40196, 41742, 46380, 50245, 55656, 60294, 61840, 69570, 80392, 83484, 90441, 92760, 100490, 104355, 111312, 120588, 139140, 150735, 160784, 166968, 180882, 185520, 200980, 208710, 241176, 271323, 278280, 301470, 333936, 361764, 401960, 417420, 452205, 482352, 542646, 556560, 602940, 723528, 803920, 834840, 904410, 1085292, 1205880, 1356615, 1447056, 1669680, 1808820, 2170584, 2411760, 2713230, 3617640, 4341168, 5426460, 7235280, 10852920, 21705840]

約数ペア:

[(1, 21705840), (2, 10852920), (3, 7235280), (4, 5426460), (5, 4341168), (6, 3617640), (8, 2713230), (9, 2411760), (10, 2170584), (12, 1808820), (13, 1669680), (15, 1447056), (16, 1356615), (18, 1205880), (20, 1085292), (24, 904410), (26, 834840), (27, 803920), (30, 723528), (36, 602940), (39, 556560), (40, 542646), (45, 482352), (48, 452205), (52, 417420), (54, 401960), (60, 361764), (65, 333936), (72, 301470), (78, 278280), (80, 271323), (90, 241176), (104, 208710), (108, 200980), (117, 185520), (120, 180882), (130, 166968), (135, 160784), (144, 150735), (156, 139140), (180, 120588), (195, 111312), (208, 104355), (216, 100490), (234, 92760), (240, 90441), (260, 83484), (270, 80392), (312, 69570), (351, 61840), (360, 60294), (390, 55656), (432, 50245), (468, 46380), (520, 41742), (540, 40196), (585, 37104), (624, 34785), (702, 30920), (720, 30147), (773, 28080), (780, 27828), (936, 23190), (1040, 20871), (1080, 20098), (1170, 18552), (1404, 15460), (1546, 14040), (1560, 13914), (1755, 12368), (1872, 11595), (2160, 10049), (2319, 9360), (2340, 9276), (2808, 7730), (3092, 7020), (3120, 6957), (3510, 6184), (3865, 5616), (4638, 4680)]