20826880

素因数分解:

$2^8\times 5^1\times {\mathrm{53}}^1\times {\mathrm{307}}^1$

素因数の和:381

約数の個数: 72

約数和(自身を含む): 50993712

約数和(自身を除く): 30166832

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 53, 64, 80, 106, 128, 160, 212, 256, 265, 307, 320, 424, 530, 614, 640, 848, 1060, 1228, 1280, 1535, 1696, 2120, 2456, 3070, 3392, 4240, 4912, 6140, 6784, 8480, 9824, 12280, 13568, 16271, 16960, 19648, 24560, 32542, 33920, 39296, 49120, 65084, 67840, 78592, 81355, 98240, 130168, 162710, 196480, 260336, 325420, 392960, 520672, 650840, 1041344, 1301680, 2082688, 2603360, 4165376, 5206720, 10413440, 20826880]

約数ペア:

[(1, 20826880), (2, 10413440), (4, 5206720), (5, 4165376), (8, 2603360), (10, 2082688), (16, 1301680), (20, 1041344), (32, 650840), (40, 520672), (53, 392960), (64, 325420), (80, 260336), (106, 196480), (128, 162710), (160, 130168), (212, 98240), (256, 81355), (265, 78592), (307, 67840), (320, 65084), (424, 49120), (530, 39296), (614, 33920), (640, 32542), (848, 24560), (1060, 19648), (1228, 16960), (1280, 16271), (1535, 13568), (1696, 12280), (2120, 9824), (2456, 8480), (3070, 6784), (3392, 6140), (4240, 4912)]