21432580

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{373}}^1$

素因数の和:425

約数の個数: 72

約数和(自身を含む): 51742152

約数和(自身を除く): 30309572

約数列:

[1, 2, 4, 5, 10, 13, 17, 20, 26, 34, 52, 65, 68, 85, 130, 169, 170, 221, 260, 338, 340, 373, 442, 676, 746, 845, 884, 1105, 1492, 1690, 1865, 2210, 2873, 3380, 3730, 4420, 4849, 5746, 6341, 7460, 9698, 11492, 12682, 14365, 19396, 24245, 25364, 28730, 31705, 48490, 57460, 63037, 63410, 82433, 96980, 126074, 126820, 164866, 252148, 315185, 329732, 412165, 630370, 824330, 1071629, 1260740, 1648660, 2143258, 4286516, 5358145, 10716290, 21432580]

約数ペア:

[(1, 21432580), (2, 10716290), (4, 5358145), (5, 4286516), (10, 2143258), (13, 1648660), (17, 1260740), (20, 1071629), (26, 824330), (34, 630370), (52, 412165), (65, 329732), (68, 315185), (85, 252148), (130, 164866), (169, 126820), (170, 126074), (221, 96980), (260, 82433), (338, 63410), (340, 63037), (373, 57460), (442, 48490), (676, 31705), (746, 28730), (845, 25364), (884, 24245), (1105, 19396), (1492, 14365), (1690, 12682), (1865, 11492), (2210, 9698), (2873, 7460), (3380, 6341), (3730, 5746), (4420, 4849)]