21716480

素因数分解:

$2^9\times 5^1\times {\mathrm{17}}^1\times {\mathrm{499}}^1$

素因数の和:539

約数の個数: 80

約数和(自身を含む): 55242000

約数和(自身を除く): 33525520

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, 499, 512, 544, 640, 680, 998, 1088, 1280, 1360, 1996, 2176, 2495, 2560, 2720, 3992, 4352, 4990, 5440, 7984, 8483, 8704, 9980, 10880, 15968, 16966, 19960, 21760, 31936, 33932, 39920, 42415, 43520, 63872, 67864, 79840, 84830, 127744, 135728, 159680, 169660, 255488, 271456, 319360, 339320, 542912, 638720, 678640, 1085824, 1277440, 1357280, 2171648, 2714560, 4343296, 5429120, 10858240, 21716480]

約数ペア:

[(1, 21716480), (2, 10858240), (4, 5429120), (5, 4343296), (8, 2714560), (10, 2171648), (16, 1357280), (17, 1277440), (20, 1085824), (32, 678640), (34, 638720), (40, 542912), (64, 339320), (68, 319360), (80, 271456), (85, 255488), (128, 169660), (136, 159680), (160, 135728), (170, 127744), (256, 84830), (272, 79840), (320, 67864), (340, 63872), (499, 43520), (512, 42415), (544, 39920), (640, 33932), (680, 31936), (998, 21760), (1088, 19960), (1280, 16966), (1360, 15968), (1996, 10880), (2176, 9980), (2495, 8704), (2560, 8483), (2720, 7984), (3992, 5440), (4352, 4990)]