21167116840

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{431}}^1\times {\mathrm{72223}}^1$

素因数の和:72682

約数の個数: 64

約数和(自身を含む): 50545244160

約数和(自身を除く): 29378127320

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 431, 680, 862, 1724, 2155, 3448, 4310, 7327, 8620, 14654, 17240, 29308, 36635, 58616, 72223, 73270, 144446, 146540, 288892, 293080, 361115, 577784, 722230, 1227791, 1444460, 2455582, 2888920, 4911164, 6138955, 9822328, 12277910, 24555820, 31128113, 49111640, 62256226, 124512452, 155640565, 249024904, 311281130, 529177921, 622562260, 1058355842, 1245124520, 2116711684, 2645889605, 4233423368, 5291779210, 10583558420, 21167116840]

約数ペア:

[(1, 21167116840), (2, 10583558420), (4, 5291779210), (5, 4233423368), (8, 2645889605), (10, 2116711684), (17, 1245124520), (20, 1058355842), (34, 622562260), (40, 529177921), (68, 311281130), (85, 249024904), (136, 155640565), (170, 124512452), (340, 62256226), (431, 49111640), (680, 31128113), (862, 24555820), (1724, 12277910), (2155, 9822328), (3448, 6138955), (4310, 4911164), (7327, 2888920), (8620, 2455582), (14654, 1444460), (17240, 1227791), (29308, 722230), (36635, 577784), (58616, 361115), (72223, 293080), (73270, 288892), (144446, 146540)]