21209115

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{2683}}^1$

素因数の和:2739

約数の個数: 32

約数和(自身を含む): 37103616

約数和(自身を除く): 15894501

約数列:

[1, 3, 5, 15, 17, 31, 51, 85, 93, 155, 255, 465, 527, 1581, 2635, 2683, 7905, 8049, 13415, 40245, 45611, 83173, 136833, 228055, 249519, 415865, 684165, 1247595, 1413941, 4241823, 7069705, 21209115]

約数ペア:

[(1, 21209115), (3, 7069705), (5, 4241823), (15, 1413941), (17, 1247595), (31, 684165), (51, 415865), (85, 249519), (93, 228055), (155, 136833), (255, 83173), (465, 45611), (527, 40245), (1581, 13415), (2635, 8049), (2683, 7905)]