21053235

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{173}}^1$

素因数の和:268

約数の個数: 64

約数和(自身を含む): 41425920

約数和(自身を除く): 20372685

約数列:

[1, 3, 5, 7, 15, 19, 21, 35, 57, 61, 95, 105, 133, 173, 183, 285, 305, 399, 427, 519, 665, 865, 915, 1159, 1211, 1281, 1995, 2135, 2595, 3287, 3477, 3633, 5795, 6055, 6405, 8113, 9861, 10553, 16435, 17385, 18165, 23009, 24339, 31659, 40565, 49305, 52765, 69027, 73871, 115045, 121695, 158295, 200507, 221613, 345135, 369355, 601521, 1002535, 1108065, 1403549, 3007605, 4210647, 7017745, 21053235]

約数ペア:

[(1, 21053235), (3, 7017745), (5, 4210647), (7, 3007605), (15, 1403549), (19, 1108065), (21, 1002535), (35, 601521), (57, 369355), (61, 345135), (95, 221613), (105, 200507), (133, 158295), (173, 121695), (183, 115045), (285, 73871), (305, 69027), (399, 52765), (427, 49305), (519, 40565), (665, 31659), (865, 24339), (915, 23009), (1159, 18165), (1211, 17385), (1281, 16435), (1995, 10553), (2135, 9861), (2595, 8113), (3287, 6405), (3477, 6055), (3633, 5795)]