20439075

素因数分解:

$3^1\times 5^2\times {\mathrm{31}}^1\times {\mathrm{59}}^1\times {\mathrm{149}}^1$

素因数の和:252

約数の個数: 48

約数和(自身を含む): 35712000

約数和(自身を除く): 15272925

約数列:

[1, 3, 5, 15, 25, 31, 59, 75, 93, 149, 155, 177, 295, 447, 465, 745, 775, 885, 1475, 1829, 2235, 2325, 3725, 4425, 4619, 5487, 8791, 9145, 11175, 13857, 23095, 26373, 27435, 43955, 45725, 69285, 115475, 131865, 137175, 219775, 272521, 346425, 659325, 817563, 1362605, 4087815, 6813025, 20439075]

約数ペア:

[(1, 20439075), (3, 6813025), (5, 4087815), (15, 1362605), (25, 817563), (31, 659325), (59, 346425), (75, 272521), (93, 219775), (149, 137175), (155, 131865), (177, 115475), (295, 69285), (447, 45725), (465, 43955), (745, 27435), (775, 26373), (885, 23095), (1475, 13857), (1829, 11175), (2235, 9145), (2325, 8791), (3725, 5487), (4425, 4619)]