19684215

素因数分解:

$3^5\times 5^1\times {\mathrm{17}}^1\times {\mathrm{953}}^1$

素因数の和:990

約数の個数: 48

約数和(自身を含む): 37503648

約数和(自身を除く): 17819433

約数列:

[1, 3, 5, 9, 15, 17, 27, 45, 51, 81, 85, 135, 153, 243, 255, 405, 459, 765, 953, 1215, 1377, 2295, 2859, 4131, 4765, 6885, 8577, 14295, 16201, 20655, 25731, 42885, 48603, 77193, 81005, 128655, 145809, 231579, 243015, 385965, 437427, 729045, 1157895, 1312281, 2187135, 3936843, 6561405, 19684215]

約数ペア:

[(1, 19684215), (3, 6561405), (5, 3936843), (9, 2187135), (15, 1312281), (17, 1157895), (27, 729045), (45, 437427), (51, 385965), (81, 243015), (85, 231579), (135, 145809), (153, 128655), (243, 81005), (255, 77193), (405, 48603), (459, 42885), (765, 25731), (953, 20655), (1215, 16201), (1377, 14295), (2295, 8577), (2859, 6885), (4131, 4765)]