21987840

素因数分解:

$2^9\times 3^1\times 5^1\times 7^1\times {\mathrm{409}}^1$

素因数の和:442

約数の個数: 160

約数和(自身を含む): 80530560

約数和(自身を除く): 58542720

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 32, 35, 40, 42, 48, 56, 60, 64, 70, 80, 84, 96, 105, 112, 120, 128, 140, 160, 168, 192, 210, 224, 240, 256, 280, 320, 336, 384, 409, 420, 448, 480, 512, 560, 640, 672, 768, 818, 840, 896, 960, 1120, 1227, 1280, 1344, 1536, 1636, 1680, 1792, 1920, 2045, 2240, 2454, 2560, 2688, 2863, 3272, 3360, 3584, 3840, 4090, 4480, 4908, 5376, 5726, 6135, 6544, 6720, 7680, 8180, 8589, 8960, 9816, 10752, 11452, 12270, 13088, 13440, 14315, 16360, 17178, 17920, 19632, 22904, 24540, 26176, 26880, 28630, 32720, 34356, 39264, 42945, 45808, 49080, 52352, 53760, 57260, 65440, 68712, 78528, 85890, 91616, 98160, 104704, 114520, 130880, 137424, 157056, 171780, 183232, 196320, 209408, 229040, 261760, 274848, 314112, 343560, 366464, 392640, 458080, 523520, 549696, 628224, 687120, 732928, 785280, 916160, 1047040, 1099392, 1374240, 1465856, 1570560, 1832320, 2198784, 2748480, 3141120, 3664640, 4397568, 5496960, 7329280, 10993920, 21987840]

約数ペア:

[(1, 21987840), (2, 10993920), (3, 7329280), (4, 5496960), (5, 4397568), (6, 3664640), (7, 3141120), (8, 2748480), (10, 2198784), (12, 1832320), (14, 1570560), (15, 1465856), (16, 1374240), (20, 1099392), (21, 1047040), (24, 916160), (28, 785280), (30, 732928), (32, 687120), (35, 628224), (40, 549696), (42, 523520), (48, 458080), (56, 392640), (60, 366464), (64, 343560), (70, 314112), (80, 274848), (84, 261760), (96, 229040), (105, 209408), (112, 196320), (120, 183232), (128, 171780), (140, 157056), (160, 137424), (168, 130880), (192, 114520), (210, 104704), (224, 98160), (240, 91616), (256, 85890), (280, 78528), (320, 68712), (336, 65440), (384, 57260), (409, 53760), (420, 52352), (448, 49080), (480, 45808), (512, 42945), (560, 39264), (640, 34356), (672, 32720), (768, 28630), (818, 26880), (840, 26176), (896, 24540), (960, 22904), (1120, 19632), (1227, 17920), (1280, 17178), (1344, 16360), (1536, 14315), (1636, 13440), (1680, 13088), (1792, 12270), (1920, 11452), (2045, 10752), (2240, 9816), (2454, 8960), (2560, 8589), (2688, 8180), (2863, 7680), (3272, 6720), (3360, 6544), (3584, 6135), (3840, 5726), (4090, 5376), (4480, 4908)]