20912788

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{577}}^1$

素因数の和:652

約数の個数: 48

約数和(自身を含む): 42822864

約数和(自身を除く): 21910076

約数列:

[1, 2, 4, 13, 17, 26, 34, 41, 52, 68, 82, 164, 221, 442, 533, 577, 697, 884, 1066, 1154, 1394, 2132, 2308, 2788, 7501, 9061, 9809, 15002, 18122, 19618, 23657, 30004, 36244, 39236, 47314, 94628, 127517, 255034, 307541, 402169, 510068, 615082, 804338, 1230164, 1608676, 5228197, 10456394, 20912788]

約数ペア:

[(1, 20912788), (2, 10456394), (4, 5228197), (13, 1608676), (17, 1230164), (26, 804338), (34, 615082), (41, 510068), (52, 402169), (68, 307541), (82, 255034), (164, 127517), (221, 94628), (442, 47314), (533, 39236), (577, 36244), (697, 30004), (884, 23657), (1066, 19618), (1154, 18122), (1394, 15002), (2132, 9809), (2308, 9061), (2788, 7501)]