21250390

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{67}}^1\times {\mathrm{197}}^1$

素因数の和:301

約数の個数: 64

約数和(自身を含む): 46531584

約数和(自身を除く): 25281194

約数列:

[1, 2, 5, 7, 10, 14, 23, 35, 46, 67, 70, 115, 134, 161, 197, 230, 322, 335, 394, 469, 670, 805, 938, 985, 1379, 1541, 1610, 1970, 2345, 2758, 3082, 4531, 4690, 6895, 7705, 9062, 10787, 13199, 13790, 15410, 21574, 22655, 26398, 31717, 45310, 53935, 63434, 65995, 92393, 107870, 131990, 158585, 184786, 303577, 317170, 461965, 607154, 923930, 1517885, 2125039, 3035770, 4250078, 10625195, 21250390]

約数ペア:

[(1, 21250390), (2, 10625195), (5, 4250078), (7, 3035770), (10, 2125039), (14, 1517885), (23, 923930), (35, 607154), (46, 461965), (67, 317170), (70, 303577), (115, 184786), (134, 158585), (161, 131990), (197, 107870), (230, 92393), (322, 65995), (335, 63434), (394, 53935), (469, 45310), (670, 31717), (805, 26398), (938, 22655), (985, 21574), (1379, 15410), (1541, 13790), (1610, 13199), (1970, 10787), (2345, 9062), (2758, 7705), (3082, 6895), (4531, 4690)]