21256560

素因数分解:

$2^4\times 3^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{757}}^1$

素因数の和:792

約数の個数: 160

約数和(自身を含む): 78953280

約数和(自身を除く): 57696720

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, 757, 780, 936, 1040, 1080, 1170, 1404, 1514, 1560, 1755, 1872, 2160, 2271, 2340, 2808, 3028, 3120, 3510, 3785, 4542, 4680, 5616, 6056, 6813, 7020, 7570, 9084, 9360, 9841, 11355, 12112, 13626, 14040, 15140, 18168, 19682, 20439, 22710, 27252, 28080, 29523, 30280, 34065, 36336, 39364, 40878, 45420, 49205, 54504, 59046, 60560, 68130, 78728, 81756, 88569, 90840, 98410, 102195, 109008, 118092, 136260, 147615, 157456, 163512, 177138, 181680, 196820, 204390, 236184, 265707, 272520, 295230, 327024, 354276, 393640, 408780, 442845, 472368, 531414, 545040, 590460, 708552, 787280, 817560, 885690, 1062828, 1180920, 1328535, 1417104, 1635120, 1771380, 2125656, 2361840, 2657070, 3542760, 4251312, 5314140, 7085520, 10628280, 21256560]

約数ペア:

[(1, 21256560), (2, 10628280), (3, 7085520), (4, 5314140), (5, 4251312), (6, 3542760), (8, 2657070), (9, 2361840), (10, 2125656), (12, 1771380), (13, 1635120), (15, 1417104), (16, 1328535), (18, 1180920), (20, 1062828), (24, 885690), (26, 817560), (27, 787280), (30, 708552), (36, 590460), (39, 545040), (40, 531414), (45, 472368), (48, 442845), (52, 408780), (54, 393640), (60, 354276), (65, 327024), (72, 295230), (78, 272520), (80, 265707), (90, 236184), (104, 204390), (108, 196820), (117, 181680), (120, 177138), (130, 163512), (135, 157456), (144, 147615), (156, 136260), (180, 118092), (195, 109008), (208, 102195), (216, 98410), (234, 90840), (240, 88569), (260, 81756), (270, 78728), (312, 68130), (351, 60560), (360, 59046), (390, 54504), (432, 49205), (468, 45420), (520, 40878), (540, 39364), (585, 36336), (624, 34065), (702, 30280), (720, 29523), (757, 28080), (780, 27252), (936, 22710), (1040, 20439), (1080, 19682), (1170, 18168), (1404, 15140), (1514, 14040), (1560, 13626), (1755, 12112), (1872, 11355), (2160, 9841), (2271, 9360), (2340, 9084), (2808, 7570), (3028, 7020), (3120, 6813), (3510, 6056), (3785, 5616), (4542, 4680)]