20951680

素因数分解:

$2^7\times 5^1\times {\mathrm{19}}^1\times {\mathrm{1723}}^1$

素因数の和:1761

約数の個数: 64

約数和(自身を含む): 52754400

約数和(自身を除く): 31802720

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 64, 76, 80, 95, 128, 152, 160, 190, 304, 320, 380, 608, 640, 760, 1216, 1520, 1723, 2432, 3040, 3446, 6080, 6892, 8615, 12160, 13784, 17230, 27568, 32737, 34460, 55136, 65474, 68920, 110272, 130948, 137840, 163685, 220544, 261896, 275680, 327370, 523792, 551360, 654740, 1047584, 1102720, 1309480, 2095168, 2618960, 4190336, 5237920, 10475840, 20951680]

約数ペア:

[(1, 20951680), (2, 10475840), (4, 5237920), (5, 4190336), (8, 2618960), (10, 2095168), (16, 1309480), (19, 1102720), (20, 1047584), (32, 654740), (38, 551360), (40, 523792), (64, 327370), (76, 275680), (80, 261896), (95, 220544), (128, 163685), (152, 137840), (160, 130948), (190, 110272), (304, 68920), (320, 65474), (380, 55136), (608, 34460), (640, 32737), (760, 27568), (1216, 17230), (1520, 13784), (1723, 12160), (2432, 8615), (3040, 6892), (3446, 6080)]