28113920

素因数分解:

$2^{10}\times 5^1\times {\mathrm{17}}^2\times {\mathrm{19}}^1$

素因数の和:78

約数の個数: 132

約数和(自身を含む): 75411480

約数和(自身を除く): 47297560

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 19, 20, 32, 34, 38, 40, 64, 68, 76, 80, 85, 95, 128, 136, 152, 160, 170, 190, 256, 272, 289, 304, 320, 323, 340, 380, 512, 544, 578, 608, 640, 646, 680, 760, 1024, 1088, 1156, 1216, 1280, 1292, 1360, 1445, 1520, 1615, 2176, 2312, 2432, 2560, 2584, 2720, 2890, 3040, 3230, 4352, 4624, 4864, 5120, 5168, 5440, 5491, 5780, 6080, 6460, 8704, 9248, 9728, 10336, 10880, 10982, 11560, 12160, 12920, 17408, 18496, 19456, 20672, 21760, 21964, 23120, 24320, 25840, 27455, 36992, 41344, 43520, 43928, 46240, 48640, 51680, 54910, 73984, 82688, 87040, 87856, 92480, 97280, 103360, 109820, 147968, 165376, 175712, 184960, 206720, 219640, 295936, 330752, 351424, 369920, 413440, 439280, 702848, 739840, 826880, 878560, 1405696, 1479680, 1653760, 1757120, 2811392, 3514240, 5622784, 7028480, 14056960, 28113920]

約数ペア:

[(1, 28113920), (2, 14056960), (4, 7028480), (5, 5622784), (8, 3514240), (10, 2811392), (16, 1757120), (17, 1653760), (19, 1479680), (20, 1405696), (32, 878560), (34, 826880), (38, 739840), (40, 702848), (64, 439280), (68, 413440), (76, 369920), (80, 351424), (85, 330752), (95, 295936), (128, 219640), (136, 206720), (152, 184960), (160, 175712), (170, 165376), (190, 147968), (256, 109820), (272, 103360), (289, 97280), (304, 92480), (320, 87856), (323, 87040), (340, 82688), (380, 73984), (512, 54910), (544, 51680), (578, 48640), (608, 46240), (640, 43928), (646, 43520), (680, 41344), (760, 36992), (1024, 27455), (1088, 25840), (1156, 24320), (1216, 23120), (1280, 21964), (1292, 21760), (1360, 20672), (1445, 19456), (1520, 18496), (1615, 17408), (2176, 12920), (2312, 12160), (2432, 11560), (2560, 10982), (2584, 10880), (2720, 10336), (2890, 9728), (3040, 9248), (3230, 8704), (4352, 6460), (4624, 6080), (4864, 5780), (5120, 5491), (5168, 5440)]