20817920

素因数分解:

$2^{11}\times 5^1\times {\mathrm{19}}^1\times {\mathrm{107}}^1$

素因数の和:153

約数の個数: 96

約数和(自身を含む): 53071200

約数和(自身を除く): 32253280

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 64, 76, 80, 95, 107, 128, 152, 160, 190, 214, 256, 304, 320, 380, 428, 512, 535, 608, 640, 760, 856, 1024, 1070, 1216, 1280, 1520, 1712, 2033, 2048, 2140, 2432, 2560, 3040, 3424, 4066, 4280, 4864, 5120, 6080, 6848, 8132, 8560, 9728, 10165, 10240, 12160, 13696, 16264, 17120, 19456, 20330, 24320, 27392, 32528, 34240, 38912, 40660, 48640, 54784, 65056, 68480, 81320, 97280, 109568, 130112, 136960, 162640, 194560, 219136, 260224, 273920, 325280, 520448, 547840, 650560, 1040896, 1095680, 1301120, 2081792, 2602240, 4163584, 5204480, 10408960, 20817920]

約数ペア:

[(1, 20817920), (2, 10408960), (4, 5204480), (5, 4163584), (8, 2602240), (10, 2081792), (16, 1301120), (19, 1095680), (20, 1040896), (32, 650560), (38, 547840), (40, 520448), (64, 325280), (76, 273920), (80, 260224), (95, 219136), (107, 194560), (128, 162640), (152, 136960), (160, 130112), (190, 109568), (214, 97280), (256, 81320), (304, 68480), (320, 65056), (380, 54784), (428, 48640), (512, 40660), (535, 38912), (608, 34240), (640, 32528), (760, 27392), (856, 24320), (1024, 20330), (1070, 19456), (1216, 17120), (1280, 16264), (1520, 13696), (1712, 12160), (2033, 10240), (2048, 10165), (2140, 9728), (2432, 8560), (2560, 8132), (3040, 6848), (3424, 6080), (4066, 5120), (4280, 4864)]