21351040

素因数分解:

$2^7\times 5^1\times {\mathrm{73}}^1\times {\mathrm{457}}^1$

素因数の和:549

約数の個数: 64

約数和(自身を含む): 51854760

約数和(自身を除く): 30503720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 73, 80, 128, 146, 160, 292, 320, 365, 457, 584, 640, 730, 914, 1168, 1460, 1828, 2285, 2336, 2920, 3656, 4570, 4672, 5840, 7312, 9140, 9344, 11680, 14624, 18280, 23360, 29248, 33361, 36560, 46720, 58496, 66722, 73120, 133444, 146240, 166805, 266888, 292480, 333610, 533776, 667220, 1067552, 1334440, 2135104, 2668880, 4270208, 5337760, 10675520, 21351040]

約数ペア:

[(1, 21351040), (2, 10675520), (4, 5337760), (5, 4270208), (8, 2668880), (10, 2135104), (16, 1334440), (20, 1067552), (32, 667220), (40, 533776), (64, 333610), (73, 292480), (80, 266888), (128, 166805), (146, 146240), (160, 133444), (292, 73120), (320, 66722), (365, 58496), (457, 46720), (584, 36560), (640, 33361), (730, 29248), (914, 23360), (1168, 18280), (1460, 14624), (1828, 11680), (2285, 9344), (2336, 9140), (2920, 7312), (3656, 5840), (4570, 4672)]