19888640

素因数分解:

$2^9\times 5^1\times {\mathrm{17}}^1\times {\mathrm{457}}^1$

素因数の和:497

約数の個数: 80

約数和(自身を含む): 50601672

約数和(自身を除く): 30713032

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 64, 68, 80, 85, 128, 136, 160, 170, 256, 272, 320, 340, 457, 512, 544, 640, 680, 914, 1088, 1280, 1360, 1828, 2176, 2285, 2560, 2720, 3656, 4352, 4570, 5440, 7312, 7769, 8704, 9140, 10880, 14624, 15538, 18280, 21760, 29248, 31076, 36560, 38845, 43520, 58496, 62152, 73120, 77690, 116992, 124304, 146240, 155380, 233984, 248608, 292480, 310760, 497216, 584960, 621520, 994432, 1169920, 1243040, 1988864, 2486080, 3977728, 4972160, 9944320, 19888640]

約数ペア:

[(1, 19888640), (2, 9944320), (4, 4972160), (5, 3977728), (8, 2486080), (10, 1988864), (16, 1243040), (17, 1169920), (20, 994432), (32, 621520), (34, 584960), (40, 497216), (64, 310760), (68, 292480), (80, 248608), (85, 233984), (128, 155380), (136, 146240), (160, 124304), (170, 116992), (256, 77690), (272, 73120), (320, 62152), (340, 58496), (457, 43520), (512, 38845), (544, 36560), (640, 31076), (680, 29248), (914, 21760), (1088, 18280), (1280, 15538), (1360, 14624), (1828, 10880), (2176, 9140), (2285, 8704), (2560, 7769), (2720, 7312), (3656, 5440), (4352, 4570)]