21297920

素因数分解:

$2^8\times 5^1\times 7^1\times {\mathrm{2377}}^1$

素因数の和:2405

約数の個数: 72

約数和(自身を含む): 58327584

約数和(自身を除く): 37029664

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 64, 70, 80, 112, 128, 140, 160, 224, 256, 280, 320, 448, 560, 640, 896, 1120, 1280, 1792, 2240, 2377, 4480, 4754, 8960, 9508, 11885, 16639, 19016, 23770, 33278, 38032, 47540, 66556, 76064, 83195, 95080, 133112, 152128, 166390, 190160, 266224, 304256, 332780, 380320, 532448, 608512, 665560, 760640, 1064896, 1331120, 1521280, 2129792, 2662240, 3042560, 4259584, 5324480, 10648960, 21297920]

約数ペア:

[(1, 21297920), (2, 10648960), (4, 5324480), (5, 4259584), (7, 3042560), (8, 2662240), (10, 2129792), (14, 1521280), (16, 1331120), (20, 1064896), (28, 760640), (32, 665560), (35, 608512), (40, 532448), (56, 380320), (64, 332780), (70, 304256), (80, 266224), (112, 190160), (128, 166390), (140, 152128), (160, 133112), (224, 95080), (256, 83195), (280, 76064), (320, 66556), (448, 47540), (560, 38032), (640, 33278), (896, 23770), (1120, 19016), (1280, 16639), (1792, 11885), (2240, 9508), (2377, 8960), (4480, 4754)]