21574455

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{149}}^1\times {\mathrm{197}}^1$

素因数の和:368

約数の個数: 48

約数和(自身を含む): 40629600

約数和(自身を除く): 19055145

約数列:

[1, 3, 5, 7, 15, 21, 35, 49, 105, 147, 149, 197, 245, 447, 591, 735, 745, 985, 1043, 1379, 2235, 2955, 3129, 4137, 5215, 6895, 7301, 9653, 15645, 20685, 21903, 28959, 29353, 36505, 48265, 88059, 109515, 144795, 146765, 205471, 440295, 616413, 1027355, 1438297, 3082065, 4314891, 7191485, 21574455]

約数ペア:

[(1, 21574455), (3, 7191485), (5, 4314891), (7, 3082065), (15, 1438297), (21, 1027355), (35, 616413), (49, 440295), (105, 205471), (147, 146765), (149, 144795), (197, 109515), (245, 88059), (447, 48265), (591, 36505), (735, 29353), (745, 28959), (985, 21903), (1043, 20685), (1379, 15645), (2235, 9653), (2955, 7301), (3129, 6895), (4137, 5215)]