20040705

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^2\times {\mathrm{23}}^1\times {\mathrm{67}}^1$

素因数の和:135

約数の個数: 72

約数和(自身を含む): 39079872

約数和(自身を除く): 19039167

約数列:

[1, 3, 5, 9, 15, 17, 23, 45, 51, 67, 69, 85, 115, 153, 201, 207, 255, 289, 335, 345, 391, 603, 765, 867, 1005, 1035, 1139, 1173, 1445, 1541, 1955, 2601, 3015, 3417, 3519, 4335, 4623, 5695, 5865, 6647, 7705, 10251, 13005, 13869, 17085, 17595, 19363, 19941, 23115, 26197, 33235, 51255, 58089, 59823, 69345, 78591, 96815, 99705, 130985, 174267, 235773, 290445, 299115, 392955, 445349, 871335, 1178865, 1336047, 2226745, 4008141, 6680235, 20040705]

約数ペア:

[(1, 20040705), (3, 6680235), (5, 4008141), (9, 2226745), (15, 1336047), (17, 1178865), (23, 871335), (45, 445349), (51, 392955), (67, 299115), (69, 290445), (85, 235773), (115, 174267), (153, 130985), (201, 99705), (207, 96815), (255, 78591), (289, 69345), (335, 59823), (345, 58089), (391, 51255), (603, 33235), (765, 26197), (867, 23115), (1005, 19941), (1035, 19363), (1139, 17595), (1173, 17085), (1445, 13869), (1541, 13005), (1955, 10251), (2601, 7705), (3015, 6647), (3417, 5865), (3519, 5695), (4335, 4623)]