20976640

素因数分解:

$2^{10}\times 5^1\times {\mathrm{17}}^1\times {\mathrm{241}}^1$

素因数の和:283

約数の個数: 88

約数和(自身を含む): 53500392

約数和(自身を除く): 32523752

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 64, 68, 80, 85, 128, 136, 160, 170, 241, 256, 272, 320, 340, 482, 512, 544, 640, 680, 964, 1024, 1088, 1205, 1280, 1360, 1928, 2176, 2410, 2560, 2720, 3856, 4097, 4352, 4820, 5120, 5440, 7712, 8194, 8704, 9640, 10880, 15424, 16388, 17408, 19280, 20485, 21760, 30848, 32776, 38560, 40970, 43520, 61696, 65552, 77120, 81940, 87040, 123392, 131104, 154240, 163880, 246784, 262208, 308480, 327760, 524416, 616960, 655520, 1048832, 1233920, 1311040, 2097664, 2622080, 4195328, 5244160, 10488320, 20976640]

約数ペア:

[(1, 20976640), (2, 10488320), (4, 5244160), (5, 4195328), (8, 2622080), (10, 2097664), (16, 1311040), (17, 1233920), (20, 1048832), (32, 655520), (34, 616960), (40, 524416), (64, 327760), (68, 308480), (80, 262208), (85, 246784), (128, 163880), (136, 154240), (160, 131104), (170, 123392), (241, 87040), (256, 81940), (272, 77120), (320, 65552), (340, 61696), (482, 43520), (512, 40970), (544, 38560), (640, 32776), (680, 30848), (964, 21760), (1024, 20485), (1088, 19280), (1205, 17408), (1280, 16388), (1360, 15424), (1928, 10880), (2176, 9640), (2410, 8704), (2560, 8194), (2720, 7712), (3856, 5440), (4097, 5120), (4352, 4820)]