20824960

素因数分解:

$2^7\times 5^1\times {\mathrm{13}}^1\times {\mathrm{2503}}^1$

素因数の和:2535

約数の個数: 64

約数和(自身を含む): 53635680

約数和(自身を除く): 32810720

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 128, 130, 160, 208, 260, 320, 416, 520, 640, 832, 1040, 1664, 2080, 2503, 4160, 5006, 8320, 10012, 12515, 20024, 25030, 32539, 40048, 50060, 65078, 80096, 100120, 130156, 160192, 162695, 200240, 260312, 320384, 325390, 400480, 520624, 650780, 800960, 1041248, 1301560, 1601920, 2082496, 2603120, 4164992, 5206240, 10412480, 20824960]

約数ペア:

[(1, 20824960), (2, 10412480), (4, 5206240), (5, 4164992), (8, 2603120), (10, 2082496), (13, 1601920), (16, 1301560), (20, 1041248), (26, 800960), (32, 650780), (40, 520624), (52, 400480), (64, 325390), (65, 320384), (80, 260312), (104, 200240), (128, 162695), (130, 160192), (160, 130156), (208, 100120), (260, 80096), (320, 65078), (416, 50060), (520, 40048), (640, 32539), (832, 25030), (1040, 20024), (1664, 12515), (2080, 10012), (2503, 8320), (4160, 5006)]