20638935

素因数分解:

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

素因数の和:94

約数の個数: 72

約数和(自身を含む): 40745040

約数和(自身を除く): 20106105

約数列:

[1, 3, 5, 9, 15, 17, 23, 27, 45, 51, 69, 85, 115, 135, 153, 207, 255, 289, 345, 391, 459, 529, 621, 765, 867, 1035, 1173, 1445, 1587, 1955, 2295, 2601, 2645, 3105, 3519, 4335, 4761, 5865, 6647, 7803, 7935, 8993, 10557, 13005, 14283, 17595, 19941, 23805, 26979, 33235, 39015, 44965, 52785, 59823, 71415, 80937, 99705, 134895, 152881, 179469, 242811, 299115, 404685, 458643, 764405, 897345, 1214055, 1375929, 2293215, 4127787, 6879645, 20638935]

約数ペア:

[(1, 20638935), (3, 6879645), (5, 4127787), (9, 2293215), (15, 1375929), (17, 1214055), (23, 897345), (27, 764405), (45, 458643), (51, 404685), (69, 299115), (85, 242811), (115, 179469), (135, 152881), (153, 134895), (207, 99705), (255, 80937), (289, 71415), (345, 59823), (391, 52785), (459, 44965), (529, 39015), (621, 33235), (765, 26979), (867, 23805), (1035, 19941), (1173, 17595), (1445, 14283), (1587, 13005), (1955, 10557), (2295, 8993), (2601, 7935), (2645, 7803), (3105, 6647), (3519, 5865), (4335, 4761)]