21135540

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{131}}^1\times {\mathrm{2689}}^1$

素因数の和:2832

約数の個数: 48

約数和(自身を含む): 59653440

約数和(自身を除く): 38517900

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 131, 262, 393, 524, 655, 786, 1310, 1572, 1965, 2620, 2689, 3930, 5378, 7860, 8067, 10756, 13445, 16134, 26890, 32268, 40335, 53780, 80670, 161340, 352259, 704518, 1056777, 1409036, 1761295, 2113554, 3522590, 4227108, 5283885, 7045180, 10567770, 21135540]

約数ペア:

[(1, 21135540), (2, 10567770), (3, 7045180), (4, 5283885), (5, 4227108), (6, 3522590), (10, 2113554), (12, 1761295), (15, 1409036), (20, 1056777), (30, 704518), (60, 352259), (131, 161340), (262, 80670), (393, 53780), (524, 40335), (655, 32268), (786, 26890), (1310, 16134), (1572, 13445), (1965, 10756), (2620, 8067), (2689, 7860), (3930, 5378)]