15999975

素因数分解:

$3^2\times 5^2\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{89}}^1$

素因数の和:169

約数の個数: 72

約数和(自身を含む): 31337280

約数和(自身を除く): 15337305

約数列:

[1, 3, 5, 9, 15, 17, 25, 45, 47, 51, 75, 85, 89, 141, 153, 225, 235, 255, 267, 423, 425, 445, 705, 765, 799, 801, 1175, 1275, 1335, 1513, 2115, 2225, 2397, 3525, 3825, 3995, 4005, 4183, 4539, 6675, 7191, 7565, 10575, 11985, 12549, 13617, 19975, 20025, 20915, 22695, 35955, 37647, 37825, 59925, 62745, 68085, 71111, 104575, 113475, 179775, 188235, 213333, 313725, 340425, 355555, 639999, 941175, 1066665, 1777775, 3199995, 5333325, 15999975]

約数ペア:

[(1, 15999975), (3, 5333325), (5, 3199995), (9, 1777775), (15, 1066665), (17, 941175), (25, 639999), (45, 355555), (47, 340425), (51, 313725), (75, 213333), (85, 188235), (89, 179775), (141, 113475), (153, 104575), (225, 71111), (235, 68085), (255, 62745), (267, 59925), (423, 37825), (425, 37647), (445, 35955), (705, 22695), (765, 20915), (799, 20025), (801, 19975), (1175, 13617), (1275, 12549), (1335, 11985), (1513, 10575), (2115, 7565), (2225, 7191), (2397, 6675), (3525, 4539), (3825, 4183), (3995, 4005)]