21385672

素因数分解:

$2^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{149}}^1\times {\mathrm{233}}^1$

素因数の和:406

約数の個数: 64

約数和(自身を含む): 50544000

約数和(自身を除く): 29158328

約数列:

[1, 2, 4, 7, 8, 11, 14, 22, 28, 44, 56, 77, 88, 149, 154, 233, 298, 308, 466, 596, 616, 932, 1043, 1192, 1631, 1639, 1864, 2086, 2563, 3262, 3278, 4172, 5126, 6524, 6556, 8344, 10252, 11473, 13048, 13112, 17941, 20504, 22946, 34717, 35882, 45892, 69434, 71764, 91784, 138868, 143528, 243019, 277736, 381887, 486038, 763774, 972076, 1527548, 1944152, 2673209, 3055096, 5346418, 10692836, 21385672]

約数ペア:

[(1, 21385672), (2, 10692836), (4, 5346418), (7, 3055096), (8, 2673209), (11, 1944152), (14, 1527548), (22, 972076), (28, 763774), (44, 486038), (56, 381887), (77, 277736), (88, 243019), (149, 143528), (154, 138868), (233, 91784), (298, 71764), (308, 69434), (466, 45892), (596, 35882), (616, 34717), (932, 22946), (1043, 20504), (1192, 17941), (1631, 13112), (1639, 13048), (1864, 11473), (2086, 10252), (2563, 8344), (3262, 6556), (3278, 6524), (4172, 5126)]