21742720

素因数分解:

$2^7\times 5^1\times {\mathrm{53}}^1\times {\mathrm{641}}^1$

素因数の和:713

約数の個数: 64

約数和(自身を含む): 53042040

約数和(自身を除く): 31299320

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 53, 64, 80, 106, 128, 160, 212, 265, 320, 424, 530, 640, 641, 848, 1060, 1282, 1696, 2120, 2564, 3205, 3392, 4240, 5128, 6410, 6784, 8480, 10256, 12820, 16960, 20512, 25640, 33920, 33973, 41024, 51280, 67946, 82048, 102560, 135892, 169865, 205120, 271784, 339730, 410240, 543568, 679460, 1087136, 1358920, 2174272, 2717840, 4348544, 5435680, 10871360, 21742720]

約数ペア:

[(1, 21742720), (2, 10871360), (4, 5435680), (5, 4348544), (8, 2717840), (10, 2174272), (16, 1358920), (20, 1087136), (32, 679460), (40, 543568), (53, 410240), (64, 339730), (80, 271784), (106, 205120), (128, 169865), (160, 135892), (212, 102560), (265, 82048), (320, 67946), (424, 51280), (530, 41024), (640, 33973), (641, 33920), (848, 25640), (1060, 20512), (1282, 16960), (1696, 12820), (2120, 10256), (2564, 8480), (3205, 6784), (3392, 6410), (4240, 5128)]