20099840

素因数分解:

$2^8\times 5^1\times {\mathrm{41}}^1\times {\mathrm{383}}^1$

素因数の和:445

約数の個数: 72

約数和(自身を含む): 49448448

約数和(自身を除く): 29348608

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 41, 64, 80, 82, 128, 160, 164, 205, 256, 320, 328, 383, 410, 640, 656, 766, 820, 1280, 1312, 1532, 1640, 1915, 2624, 3064, 3280, 3830, 5248, 6128, 6560, 7660, 10496, 12256, 13120, 15320, 15703, 24512, 26240, 30640, 31406, 49024, 52480, 61280, 62812, 78515, 98048, 122560, 125624, 157030, 245120, 251248, 314060, 490240, 502496, 628120, 1004992, 1256240, 2009984, 2512480, 4019968, 5024960, 10049920, 20099840]

約数ペア:

[(1, 20099840), (2, 10049920), (4, 5024960), (5, 4019968), (8, 2512480), (10, 2009984), (16, 1256240), (20, 1004992), (32, 628120), (40, 502496), (41, 490240), (64, 314060), (80, 251248), (82, 245120), (128, 157030), (160, 125624), (164, 122560), (205, 98048), (256, 78515), (320, 62812), (328, 61280), (383, 52480), (410, 49024), (640, 31406), (656, 30640), (766, 26240), (820, 24512), (1280, 15703), (1312, 15320), (1532, 13120), (1640, 12256), (1915, 10496), (2624, 7660), (3064, 6560), (3280, 6128), (3830, 5248)]