20715520

素因数分解:

$2^{11}\times 5^1\times 7^1\times {\mathrm{17}}^2$

素因数の和:68

約数の個数: 144

約数和(自身を含む): 60343920

約数和(自身を除く): 39628400

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 17, 20, 28, 32, 34, 35, 40, 56, 64, 68, 70, 80, 85, 112, 119, 128, 136, 140, 160, 170, 224, 238, 256, 272, 280, 289, 320, 340, 448, 476, 512, 544, 560, 578, 595, 640, 680, 896, 952, 1024, 1088, 1120, 1156, 1190, 1280, 1360, 1445, 1792, 1904, 2023, 2048, 2176, 2240, 2312, 2380, 2560, 2720, 2890, 3584, 3808, 4046, 4352, 4480, 4624, 4760, 5120, 5440, 5780, 7168, 7616, 8092, 8704, 8960, 9248, 9520, 10115, 10240, 10880, 11560, 14336, 15232, 16184, 17408, 17920, 18496, 19040, 20230, 21760, 23120, 30464, 32368, 34816, 35840, 36992, 38080, 40460, 43520, 46240, 60928, 64736, 71680, 73984, 76160, 80920, 87040, 92480, 121856, 129472, 147968, 152320, 161840, 174080, 184960, 243712, 258944, 295936, 304640, 323680, 369920, 517888, 591872, 609280, 647360, 739840, 1035776, 1218560, 1294720, 1479680, 2071552, 2589440, 2959360, 4143104, 5178880, 10357760, 20715520]

約数ペア:

[(1, 20715520), (2, 10357760), (4, 5178880), (5, 4143104), (7, 2959360), (8, 2589440), (10, 2071552), (14, 1479680), (16, 1294720), (17, 1218560), (20, 1035776), (28, 739840), (32, 647360), (34, 609280), (35, 591872), (40, 517888), (56, 369920), (64, 323680), (68, 304640), (70, 295936), (80, 258944), (85, 243712), (112, 184960), (119, 174080), (128, 161840), (136, 152320), (140, 147968), (160, 129472), (170, 121856), (224, 92480), (238, 87040), (256, 80920), (272, 76160), (280, 73984), (289, 71680), (320, 64736), (340, 60928), (448, 46240), (476, 43520), (512, 40460), (544, 38080), (560, 36992), (578, 35840), (595, 34816), (640, 32368), (680, 30464), (896, 23120), (952, 21760), (1024, 20230), (1088, 19040), (1120, 18496), (1156, 17920), (1190, 17408), (1280, 16184), (1360, 15232), (1445, 14336), (1792, 11560), (1904, 10880), (2023, 10240), (2048, 10115), (2176, 9520), (2240, 9248), (2312, 8960), (2380, 8704), (2560, 8092), (2720, 7616), (2890, 7168), (3584, 5780), (3808, 5440), (4046, 5120), (4352, 4760), (4480, 4624)]