19890

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1$

素因数の和:43

約数の個数: 48

約数和(自身を含む): 58968

約数和(自身を除く): 39078

約数列:

[1, 2, 3, 5, 6, 9, 10, 13, 15, 17, 18, 26, 30, 34, 39, 45, 51, 65, 78, 85, 90, 102, 117, 130, 153, 170, 195, 221, 234, 255, 306, 390, 442, 510, 585, 663, 765, 1105, 1170, 1326, 1530, 1989, 2210, 3315, 3978, 6630, 9945, 19890]

約数ペア:

[(1, 19890), (2, 9945), (3, 6630), (5, 3978), (6, 3315), (9, 2210), (10, 1989), (13, 1530), (15, 1326), (17, 1170), (18, 1105), (26, 765), (30, 663), (34, 585), (39, 510), (45, 442), (51, 390), (65, 306), (78, 255), (85, 234), (90, 221), (102, 195), (117, 170), (130, 153)]