20904664

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{97}}^1$

素因数の和:224

約数の個数: 64

約数和(自身を含む): 45158400

約数和(自身を除く): 24253736

約数列:

[1, 2, 4, 8, 11, 22, 31, 44, 62, 79, 88, 97, 124, 158, 194, 248, 316, 341, 388, 632, 682, 776, 869, 1067, 1364, 1738, 2134, 2449, 2728, 3007, 3476, 4268, 4898, 6014, 6952, 7663, 8536, 9796, 12028, 15326, 19592, 24056, 26939, 30652, 33077, 53878, 61304, 66154, 84293, 107756, 132308, 168586, 215512, 237553, 264616, 337172, 475106, 674344, 950212, 1900424, 2613083, 5226166, 10452332, 20904664]

約数ペア:

[(1, 20904664), (2, 10452332), (4, 5226166), (8, 2613083), (11, 1900424), (22, 950212), (31, 674344), (44, 475106), (62, 337172), (79, 264616), (88, 237553), (97, 215512), (124, 168586), (158, 132308), (194, 107756), (248, 84293), (316, 66154), (341, 61304), (388, 53878), (632, 33077), (682, 30652), (776, 26939), (869, 24056), (1067, 19592), (1364, 15326), (1738, 12028), (2134, 9796), (2449, 8536), (2728, 7663), (3007, 6952), (3476, 6014), (4268, 4898)]