25420880

素因数分解:

$2^4\times 5^1\times {\mathrm{197}}^1\times {\mathrm{1613}}^1$

素因数の和:1823

約数の個数: 40

約数和(自身を含む): 59440392

約数和(自身を除く): 34019512

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 197, 394, 788, 985, 1576, 1613, 1970, 3152, 3226, 3940, 6452, 7880, 8065, 12904, 15760, 16130, 25808, 32260, 64520, 129040, 317761, 635522, 1271044, 1588805, 2542088, 3177610, 5084176, 6355220, 12710440, 25420880]

約数ペア:

[(1, 25420880), (2, 12710440), (4, 6355220), (5, 5084176), (8, 3177610), (10, 2542088), (16, 1588805), (20, 1271044), (40, 635522), (80, 317761), (197, 129040), (394, 64520), (788, 32260), (985, 25808), (1576, 16130), (1613, 15760), (1970, 12904), (3152, 8065), (3226, 7880), (3940, 6452)]