20454825

素因数分解:

$3^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{263}}^1$

素因数の和:354

約数の個数: 48

約数和(自身を含む): 36533376

約数和(自身を除く): 16078551

約数列:

[1, 3, 5, 15, 17, 25, 51, 61, 75, 85, 183, 255, 263, 305, 425, 789, 915, 1037, 1275, 1315, 1525, 3111, 3945, 4471, 4575, 5185, 6575, 13413, 15555, 16043, 19725, 22355, 25925, 48129, 67065, 77775, 80215, 111775, 240645, 272731, 335325, 401075, 818193, 1203225, 1363655, 4090965, 6818275, 20454825]

約数ペア:

[(1, 20454825), (3, 6818275), (5, 4090965), (15, 1363655), (17, 1203225), (25, 818193), (51, 401075), (61, 335325), (75, 272731), (85, 240645), (183, 111775), (255, 80215), (263, 77775), (305, 67065), (425, 48129), (789, 25925), (915, 22355), (1037, 19725), (1275, 16043), (1315, 15555), (1525, 13413), (3111, 6575), (3945, 5185), (4471, 4575)]