21052955

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{149}}^1\times {\mathrm{367}}^1$

素因数の和:539

約数の個数: 32

約数和(自身を含む): 31795200

約数和(自身を除く): 10742245

約数列:

[1, 5, 7, 11, 35, 55, 77, 149, 367, 385, 745, 1043, 1639, 1835, 2569, 4037, 5215, 8195, 11473, 12845, 20185, 28259, 54683, 57365, 141295, 273415, 382781, 601513, 1913905, 3007565, 4210591, 21052955]

約数ペア:

[(1, 21052955), (5, 4210591), (7, 3007565), (11, 1913905), (35, 601513), (55, 382781), (77, 273415), (149, 141295), (367, 57365), (385, 54683), (745, 28259), (1043, 20185), (1639, 12845), (1835, 11473), (2569, 8195), (4037, 5215)]