21450988

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{67}}^1\times {\mathrm{131}}^1$

素因数の和:262

約数の個数: 48

約数和(自身を含む): 42223104

約数和(自身を除く): 20772116

約数列:

[1, 2, 4, 13, 26, 47, 52, 67, 94, 131, 134, 188, 262, 268, 524, 611, 871, 1222, 1703, 1742, 2444, 3149, 3406, 3484, 6157, 6298, 6812, 8777, 12314, 12596, 17554, 24628, 35108, 40937, 80041, 81874, 114101, 160082, 163748, 228202, 320164, 412519, 456404, 825038, 1650076, 5362747, 10725494, 21450988]

約数ペア:

[(1, 21450988), (2, 10725494), (4, 5362747), (13, 1650076), (26, 825038), (47, 456404), (52, 412519), (67, 320164), (94, 228202), (131, 163748), (134, 160082), (188, 114101), (262, 81874), (268, 80041), (524, 40937), (611, 35108), (871, 24628), (1222, 17554), (1703, 12596), (1742, 12314), (2444, 8777), (3149, 6812), (3406, 6298), (3484, 6157)]