689778830

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{171161}}^1$

素因数の和:171212

約数の個数: 32

約数和(自身を含む): 1380250368

約数和(自身を除く): 690471538

約数列:

[1, 2, 5, 10, 13, 26, 31, 62, 65, 130, 155, 310, 403, 806, 2015, 4030, 171161, 342322, 855805, 1711610, 2225093, 4450186, 5305991, 10611982, 11125465, 22250930, 26529955, 53059910, 68977883, 137955766, 344889415, 689778830]

約数ペア:

[(1, 689778830), (2, 344889415), (5, 137955766), (10, 68977883), (13, 53059910), (26, 26529955), (31, 22250930), (62, 11125465), (65, 10611982), (130, 5305991), (155, 4450186), (310, 2225093), (403, 1711610), (806, 855805), (2015, 342322), (4030, 171161)]