19971328

素因数分解:

$2^8\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{353}}^1$

素因数の和:399

約数の個数: 72

約数和(自身を含む): 45585288

約数和(自身を除く): 25613960

約数列:

[1, 2, 4, 8, 13, 16, 17, 26, 32, 34, 52, 64, 68, 104, 128, 136, 208, 221, 256, 272, 353, 416, 442, 544, 706, 832, 884, 1088, 1412, 1664, 1768, 2176, 2824, 3328, 3536, 4352, 4589, 5648, 6001, 7072, 9178, 11296, 12002, 14144, 18356, 22592, 24004, 28288, 36712, 45184, 48008, 56576, 73424, 78013, 90368, 96016, 146848, 156026, 192032, 293696, 312052, 384064, 587392, 624104, 768128, 1174784, 1248208, 1536256, 2496416, 4992832, 9985664, 19971328]

約数ペア:

[(1, 19971328), (2, 9985664), (4, 4992832), (8, 2496416), (13, 1536256), (16, 1248208), (17, 1174784), (26, 768128), (32, 624104), (34, 587392), (52, 384064), (64, 312052), (68, 293696), (104, 192032), (128, 156026), (136, 146848), (208, 96016), (221, 90368), (256, 78013), (272, 73424), (353, 56576), (416, 48008), (442, 45184), (544, 36712), (706, 28288), (832, 24004), (884, 22592), (1088, 18356), (1412, 14144), (1664, 12002), (1768, 11296), (2176, 9178), (2824, 7072), (3328, 6001), (3536, 5648), (4352, 4589)]