20678085

素因数分解:

$3^7\times 5^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1$

素因数の和:118

約数の個数: 64

約数和(自身を含む): 39045120

約数和(自身を除く): 18367035

約数列:

[1, 3, 5, 9, 15, 27, 31, 45, 61, 81, 93, 135, 155, 183, 243, 279, 305, 405, 465, 549, 729, 837, 915, 1215, 1395, 1647, 1891, 2187, 2511, 2745, 3645, 4185, 4941, 5673, 7533, 8235, 9455, 10935, 12555, 14823, 17019, 22599, 24705, 28365, 37665, 44469, 51057, 67797, 74115, 85095, 112995, 133407, 153171, 222345, 255285, 338985, 459513, 667035, 765855, 1378539, 2297565, 4135617, 6892695, 20678085]

約数ペア:

[(1, 20678085), (3, 6892695), (5, 4135617), (9, 2297565), (15, 1378539), (27, 765855), (31, 667035), (45, 459513), (61, 338985), (81, 255285), (93, 222345), (135, 153171), (155, 133407), (183, 112995), (243, 85095), (279, 74115), (305, 67797), (405, 51057), (465, 44469), (549, 37665), (729, 28365), (837, 24705), (915, 22599), (1215, 17019), (1395, 14823), (1647, 12555), (1891, 10935), (2187, 9455), (2511, 8235), (2745, 7533), (3645, 5673), (4185, 4941)]