21749120

素因数分解:

$2^7\times 5^1\times {\mathrm{17}}^1\times {\mathrm{1999}}^1$

素因数の和:2035

約数の個数: 64

約数和(自身を含む): 55080000

約数和(自身を除く): 33330880

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 64, 68, 80, 85, 128, 136, 160, 170, 272, 320, 340, 544, 640, 680, 1088, 1360, 1999, 2176, 2720, 3998, 5440, 7996, 9995, 10880, 15992, 19990, 31984, 33983, 39980, 63968, 67966, 79960, 127936, 135932, 159920, 169915, 255872, 271864, 319840, 339830, 543728, 639680, 679660, 1087456, 1279360, 1359320, 2174912, 2718640, 4349824, 5437280, 10874560, 21749120]

約数ペア:

[(1, 21749120), (2, 10874560), (4, 5437280), (5, 4349824), (8, 2718640), (10, 2174912), (16, 1359320), (17, 1279360), (20, 1087456), (32, 679660), (34, 639680), (40, 543728), (64, 339830), (68, 319840), (80, 271864), (85, 255872), (128, 169915), (136, 159920), (160, 135932), (170, 127936), (272, 79960), (320, 67966), (340, 63968), (544, 39980), (640, 33983), (680, 31984), (1088, 19990), (1360, 15992), (1999, 10880), (2176, 9995), (2720, 7996), (3998, 5440)]