20961840

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{167}}^1\times {\mathrm{523}}^1$

素因数の和:706

約数の個数: 80

約数和(自身を含む): 65495808

約数和(自身を除く): 44533968

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 167, 240, 334, 501, 523, 668, 835, 1002, 1046, 1336, 1569, 1670, 2004, 2092, 2505, 2615, 2672, 3138, 3340, 4008, 4184, 5010, 5230, 6276, 6680, 7845, 8016, 8368, 10020, 10460, 12552, 13360, 15690, 20040, 20920, 25104, 31380, 40080, 41840, 62760, 87341, 125520, 174682, 262023, 349364, 436705, 524046, 698728, 873410, 1048092, 1310115, 1397456, 1746820, 2096184, 2620230, 3493640, 4192368, 5240460, 6987280, 10480920, 20961840]

約数ペア:

[(1, 20961840), (2, 10480920), (3, 6987280), (4, 5240460), (5, 4192368), (6, 3493640), (8, 2620230), (10, 2096184), (12, 1746820), (15, 1397456), (16, 1310115), (20, 1048092), (24, 873410), (30, 698728), (40, 524046), (48, 436705), (60, 349364), (80, 262023), (120, 174682), (167, 125520), (240, 87341), (334, 62760), (501, 41840), (523, 40080), (668, 31380), (835, 25104), (1002, 20920), (1046, 20040), (1336, 15690), (1569, 13360), (1670, 12552), (2004, 10460), (2092, 10020), (2505, 8368), (2615, 8016), (2672, 7845), (3138, 6680), (3340, 6276), (4008, 5230), (4184, 5010)]