21097505

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{1553}}^1$

素因数の和:1601

約数の個数: 32

約数和(自身を含む): 31328640

約数和(自身を除く): 10231135

約数列:

[1, 5, 11, 13, 19, 55, 65, 95, 143, 209, 247, 715, 1045, 1235, 1553, 2717, 7765, 13585, 17083, 20189, 29507, 85415, 100945, 147535, 222079, 324577, 383591, 1110395, 1622885, 1917955, 4219501, 21097505]

約数ペア:

[(1, 21097505), (5, 4219501), (11, 1917955), (13, 1622885), (19, 1110395), (55, 383591), (65, 324577), (95, 222079), (143, 147535), (209, 100945), (247, 85415), (715, 29507), (1045, 20189), (1235, 17083), (1553, 13585), (2717, 7765)]