20911520

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{18671}}^1$

素因数の和:18693

約数の個数: 48

約数和(自身を含む): 56464128

約数和(自身を除く): 35552608

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 70, 80, 112, 140, 160, 224, 280, 560, 1120, 18671, 37342, 74684, 93355, 130697, 149368, 186710, 261394, 298736, 373420, 522788, 597472, 653485, 746840, 1045576, 1306970, 1493680, 2091152, 2613940, 2987360, 4182304, 5227880, 10455760, 20911520]

約数ペア:

[(1, 20911520), (2, 10455760), (4, 5227880), (5, 4182304), (7, 2987360), (8, 2613940), (10, 2091152), (14, 1493680), (16, 1306970), (20, 1045576), (28, 746840), (32, 653485), (35, 597472), (40, 522788), (56, 373420), (70, 298736), (80, 261394), (112, 186710), (140, 149368), (160, 130697), (224, 93355), (280, 74684), (560, 37342), (1120, 18671)]