21317792

素因数分解:

$2^5\times {\mathrm{61}}^1\times {\mathrm{67}}^1\times {\mathrm{163}}^1$

素因数の和:301

約数の個数: 48

約数和(自身を含む): 43559712

約数和(自身を除く): 22241920

約数列:

[1, 2, 4, 8, 16, 32, 61, 67, 122, 134, 163, 244, 268, 326, 488, 536, 652, 976, 1072, 1304, 1952, 2144, 2608, 4087, 5216, 8174, 9943, 10921, 16348, 19886, 21842, 32696, 39772, 43684, 65392, 79544, 87368, 130784, 159088, 174736, 318176, 349472, 666181, 1332362, 2664724, 5329448, 10658896, 21317792]

約数ペア:

[(1, 21317792), (2, 10658896), (4, 5329448), (8, 2664724), (16, 1332362), (32, 666181), (61, 349472), (67, 318176), (122, 174736), (134, 159088), (163, 130784), (244, 87368), (268, 79544), (326, 65392), (488, 43684), (536, 39772), (652, 32696), (976, 21842), (1072, 19886), (1304, 16348), (1952, 10921), (2144, 9943), (2608, 8174), (4087, 5216)]