19938225

素因数分解:

$3^1\times 5^2\times {\mathrm{29}}^1\times {\mathrm{89}}^1\times {\mathrm{103}}^1$

素因数の和:234

約数の個数: 48

約数和(自身を含む): 34819200

約数和(自身を除く): 14880975

約数列:

[1, 3, 5, 15, 25, 29, 75, 87, 89, 103, 145, 267, 309, 435, 445, 515, 725, 1335, 1545, 2175, 2225, 2575, 2581, 2987, 6675, 7725, 7743, 8961, 9167, 12905, 14935, 27501, 38715, 44805, 45835, 64525, 74675, 137505, 193575, 224025, 229175, 265843, 687525, 797529, 1329215, 3987645, 6646075, 19938225]

約数ペア:

[(1, 19938225), (3, 6646075), (5, 3987645), (15, 1329215), (25, 797529), (29, 687525), (75, 265843), (87, 229175), (89, 224025), (103, 193575), (145, 137505), (267, 74675), (309, 64525), (435, 45835), (445, 44805), (515, 38715), (725, 27501), (1335, 14935), (1545, 12905), (2175, 9167), (2225, 8961), (2575, 7743), (2581, 7725), (2987, 6675)]