20255775

素因数分解:

$3^1\times 5^2\times {\mathrm{29}}^1\times {\mathrm{67}}^1\times {\mathrm{139}}^1$

素因数の和:248

約数の個数: 48

約数和(自身を含む): 35414400

約数和(自身を除く): 15158625

約数列:

[1, 3, 5, 15, 25, 29, 67, 75, 87, 139, 145, 201, 335, 417, 435, 695, 725, 1005, 1675, 1943, 2085, 2175, 3475, 4031, 5025, 5829, 9313, 9715, 10425, 12093, 20155, 27939, 29145, 46565, 48575, 60465, 100775, 139695, 145725, 232825, 270077, 302325, 698475, 810231, 1350385, 4051155, 6751925, 20255775]

約数ペア:

[(1, 20255775), (3, 6751925), (5, 4051155), (15, 1350385), (25, 810231), (29, 698475), (67, 302325), (75, 270077), (87, 232825), (139, 145725), (145, 139695), (201, 100775), (335, 60465), (417, 48575), (435, 46565), (695, 29145), (725, 27939), (1005, 20155), (1675, 12093), (1943, 10425), (2085, 9715), (2175, 9313), (3475, 5829), (4031, 5025)]