20961920

素因数分解:

$2^7\times 5^1\times 7^1\times {\mathrm{4679}}^1$

素因数の和:4705

約数の個数: 64

約数和(自身を含む): 57283200

約数和(自身を除く): 36321280

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, 280, 320, 448, 560, 640, 896, 1120, 2240, 4480, 4679, 9358, 18716, 23395, 32753, 37432, 46790, 65506, 74864, 93580, 131012, 149728, 163765, 187160, 262024, 299456, 327530, 374320, 524048, 598912, 655060, 748640, 1048096, 1310120, 1497280, 2096192, 2620240, 2994560, 4192384, 5240480, 10480960, 20961920]

約数ペア:

[(1, 20961920), (2, 10480960), (4, 5240480), (5, 4192384), (7, 2994560), (8, 2620240), (10, 2096192), (14, 1497280), (16, 1310120), (20, 1048096), (28, 748640), (32, 655060), (35, 598912), (40, 524048), (56, 374320), (64, 327530), (70, 299456), (80, 262024), (112, 187160), (128, 163765), (140, 149728), (160, 131012), (224, 93580), (280, 74864), (320, 65506), (448, 46790), (560, 37432), (640, 32753), (896, 23395), (1120, 18716), (2240, 9358), (4480, 4679)]