20861925

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{79}}^1\times {\mathrm{503}}^1$

素因数の和:602

約数の個数: 48

約数和(自身を含む): 39997440

約数和(自身を除く): 19135515

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 75, 79, 105, 175, 237, 395, 503, 525, 553, 1185, 1509, 1659, 1975, 2515, 2765, 3521, 5925, 7545, 8295, 10563, 12575, 13825, 17605, 37725, 39737, 41475, 52815, 88025, 119211, 198685, 264075, 278159, 596055, 834477, 993425, 1390795, 2980275, 4172385, 6953975, 20861925]

約数ペア:

[(1, 20861925), (3, 6953975), (5, 4172385), (7, 2980275), (15, 1390795), (21, 993425), (25, 834477), (35, 596055), (75, 278159), (79, 264075), (105, 198685), (175, 119211), (237, 88025), (395, 52815), (503, 41475), (525, 39737), (553, 37725), (1185, 17605), (1509, 13825), (1659, 12575), (1975, 10563), (2515, 8295), (2765, 7545), (3521, 5925)]