20521845

素因数分解:

$3^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{313}}^1$

素因数の和:402

約数の個数: 48

約数和(自身を含む): 37619712

約数和(自身を除く): 17097867

約数列:

[1, 3, 5, 9, 15, 31, 45, 47, 93, 141, 155, 235, 279, 313, 423, 465, 705, 939, 1395, 1457, 1565, 2115, 2817, 4371, 4695, 7285, 9703, 13113, 14085, 14711, 21855, 29109, 44133, 48515, 65565, 73555, 87327, 132399, 145545, 220665, 436635, 456041, 661995, 1368123, 2280205, 4104369, 6840615, 20521845]

約数ペア:

[(1, 20521845), (3, 6840615), (5, 4104369), (9, 2280205), (15, 1368123), (31, 661995), (45, 456041), (47, 436635), (93, 220665), (141, 145545), (155, 132399), (235, 87327), (279, 73555), (313, 65565), (423, 48515), (465, 44133), (705, 29109), (939, 21855), (1395, 14711), (1457, 14085), (1565, 13113), (2115, 9703), (2817, 7285), (4371, 4695)]