21790720

素因数分解:

$2^{15}\times 5^1\times 7^1\times {\mathrm{19}}^1$

素因数の和:61

約数の個数: 128

約数和(自身を含む): 62913600

約数和(自身を除く): 41122880

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 19, 20, 28, 32, 35, 38, 40, 56, 64, 70, 76, 80, 95, 112, 128, 133, 140, 152, 160, 190, 224, 256, 266, 280, 304, 320, 380, 448, 512, 532, 560, 608, 640, 665, 760, 896, 1024, 1064, 1120, 1216, 1280, 1330, 1520, 1792, 2048, 2128, 2240, 2432, 2560, 2660, 3040, 3584, 4096, 4256, 4480, 4864, 5120, 5320, 6080, 7168, 8192, 8512, 8960, 9728, 10240, 10640, 12160, 14336, 16384, 17024, 17920, 19456, 20480, 21280, 24320, 28672, 32768, 34048, 35840, 38912, 40960, 42560, 48640, 57344, 68096, 71680, 77824, 81920, 85120, 97280, 114688, 136192, 143360, 155648, 163840, 170240, 194560, 229376, 272384, 286720, 311296, 340480, 389120, 544768, 573440, 622592, 680960, 778240, 1089536, 1146880, 1361920, 1556480, 2179072, 2723840, 3112960, 4358144, 5447680, 10895360, 21790720]

約数ペア:

[(1, 21790720), (2, 10895360), (4, 5447680), (5, 4358144), (7, 3112960), (8, 2723840), (10, 2179072), (14, 1556480), (16, 1361920), (19, 1146880), (20, 1089536), (28, 778240), (32, 680960), (35, 622592), (38, 573440), (40, 544768), (56, 389120), (64, 340480), (70, 311296), (76, 286720), (80, 272384), (95, 229376), (112, 194560), (128, 170240), (133, 163840), (140, 155648), (152, 143360), (160, 136192), (190, 114688), (224, 97280), (256, 85120), (266, 81920), (280, 77824), (304, 71680), (320, 68096), (380, 57344), (448, 48640), (512, 42560), (532, 40960), (560, 38912), (608, 35840), (640, 34048), (665, 32768), (760, 28672), (896, 24320), (1024, 21280), (1064, 20480), (1120, 19456), (1216, 17920), (1280, 17024), (1330, 16384), (1520, 14336), (1792, 12160), (2048, 10640), (2128, 10240), (2240, 9728), (2432, 8960), (2560, 8512), (2660, 8192), (3040, 7168), (3584, 6080), (4096, 5320), (4256, 5120), (4480, 4864)]