20969000

素因数分解:

$2^3\times 5^3\times {\mathrm{13}}^1\times {\mathrm{1613}}^1$

素因数の和:1647

約数の個数: 64

約数和(自身を含む): 52874640

約数和(自身を除く): 31905640

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 25, 26, 40, 50, 52, 65, 100, 104, 125, 130, 200, 250, 260, 325, 500, 520, 650, 1000, 1300, 1613, 1625, 2600, 3226, 3250, 6452, 6500, 8065, 12904, 13000, 16130, 20969, 32260, 40325, 41938, 64520, 80650, 83876, 104845, 161300, 167752, 201625, 209690, 322600, 403250, 419380, 524225, 806500, 838760, 1048450, 1613000, 2096900, 2621125, 4193800, 5242250, 10484500, 20969000]

約数ペア:

[(1, 20969000), (2, 10484500), (4, 5242250), (5, 4193800), (8, 2621125), (10, 2096900), (13, 1613000), (20, 1048450), (25, 838760), (26, 806500), (40, 524225), (50, 419380), (52, 403250), (65, 322600), (100, 209690), (104, 201625), (125, 167752), (130, 161300), (200, 104845), (250, 83876), (260, 80650), (325, 64520), (500, 41938), (520, 40325), (650, 32260), (1000, 20969), (1300, 16130), (1613, 13000), (1625, 12904), (2600, 8065), (3226, 6500), (3250, 6452)]