20613075

素因数分解:

$3^1\times 5^2\times 7^2\times {\mathrm{71}}^1\times {\mathrm{79}}^1$

素因数の和:177

約数の個数: 72

約数和(自身を含む): 40711680

約数和(自身を除く): 20098605

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 49, 71, 75, 79, 105, 147, 175, 213, 237, 245, 355, 395, 497, 525, 553, 735, 1065, 1185, 1225, 1491, 1659, 1775, 1975, 2485, 2765, 3479, 3675, 3871, 5325, 5609, 5925, 7455, 8295, 10437, 11613, 12425, 13825, 16827, 17395, 19355, 28045, 37275, 39263, 41475, 52185, 58065, 84135, 86975, 96775, 117789, 140225, 196315, 260925, 274841, 290325, 420675, 588945, 824523, 981575, 1374205, 2944725, 4122615, 6871025, 20613075]

約数ペア:

[(1, 20613075), (3, 6871025), (5, 4122615), (7, 2944725), (15, 1374205), (21, 981575), (25, 824523), (35, 588945), (49, 420675), (71, 290325), (75, 274841), (79, 260925), (105, 196315), (147, 140225), (175, 117789), (213, 96775), (237, 86975), (245, 84135), (355, 58065), (395, 52185), (497, 41475), (525, 39263), (553, 37275), (735, 28045), (1065, 19355), (1185, 17395), (1225, 16827), (1491, 13825), (1659, 12425), (1775, 11613), (1975, 10437), (2485, 8295), (2765, 7455), (3479, 5925), (3675, 5609), (3871, 5325)]