21651370

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{97}}^1\times {\mathrm{101}}^1$

素因数の和:235

約数の個数: 64

約数和(自身を含む): 45341856

約数和(自身を除く): 23690486

約数列:

[1, 2, 5, 10, 13, 17, 26, 34, 65, 85, 97, 101, 130, 170, 194, 202, 221, 442, 485, 505, 970, 1010, 1105, 1261, 1313, 1649, 1717, 2210, 2522, 2626, 3298, 3434, 6305, 6565, 8245, 8585, 9797, 12610, 13130, 16490, 17170, 19594, 21437, 22321, 42874, 44642, 48985, 97970, 107185, 111605, 127361, 166549, 214370, 223210, 254722, 333098, 636805, 832745, 1273610, 1665490, 2165137, 4330274, 10825685, 21651370]

約数ペア:

[(1, 21651370), (2, 10825685), (5, 4330274), (10, 2165137), (13, 1665490), (17, 1273610), (26, 832745), (34, 636805), (65, 333098), (85, 254722), (97, 223210), (101, 214370), (130, 166549), (170, 127361), (194, 111605), (202, 107185), (221, 97970), (442, 48985), (485, 44642), (505, 42874), (970, 22321), (1010, 21437), (1105, 19594), (1261, 17170), (1313, 16490), (1649, 13130), (1717, 12610), (2210, 9797), (2522, 8585), (2626, 8245), (3298, 6565), (3434, 6305)]