18871040

素因数分解:

$2^8\times 5^1\times {\mathrm{23}}^1\times {\mathrm{641}}^1$

素因数の和:685

約数の個数: 72

約数和(自身を含む): 47240928

約数和(自身を除く): 28369888

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 32, 40, 46, 64, 80, 92, 115, 128, 160, 184, 230, 256, 320, 368, 460, 640, 641, 736, 920, 1280, 1282, 1472, 1840, 2564, 2944, 3205, 3680, 5128, 5888, 6410, 7360, 10256, 12820, 14720, 14743, 20512, 25640, 29440, 29486, 41024, 51280, 58972, 73715, 82048, 102560, 117944, 147430, 164096, 205120, 235888, 294860, 410240, 471776, 589720, 820480, 943552, 1179440, 1887104, 2358880, 3774208, 4717760, 9435520, 18871040]

約数ペア:

[(1, 18871040), (2, 9435520), (4, 4717760), (5, 3774208), (8, 2358880), (10, 1887104), (16, 1179440), (20, 943552), (23, 820480), (32, 589720), (40, 471776), (46, 410240), (64, 294860), (80, 235888), (92, 205120), (115, 164096), (128, 147430), (160, 117944), (184, 102560), (230, 82048), (256, 73715), (320, 58972), (368, 51280), (460, 41024), (640, 29486), (641, 29440), (736, 25640), (920, 20512), (1280, 14743), (1282, 14720), (1472, 12820), (1840, 10256), (2564, 7360), (2944, 6410), (3205, 5888), (3680, 5128)]