21972704

素因数分解:

$2^5\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{239}}^1$

素因数の和:292

約数の個数: 72

約数和(自身を含む): 49805280

約数和(自身を除く): 27832576

約数列:

[1, 2, 4, 8, 13, 16, 17, 26, 32, 34, 52, 68, 104, 136, 169, 208, 221, 239, 272, 338, 416, 442, 478, 544, 676, 884, 956, 1352, 1768, 1912, 2704, 2873, 3107, 3536, 3824, 4063, 5408, 5746, 6214, 7072, 7648, 8126, 11492, 12428, 16252, 22984, 24856, 32504, 40391, 45968, 49712, 52819, 65008, 80782, 91936, 99424, 105638, 130016, 161564, 211276, 323128, 422552, 646256, 686647, 845104, 1292512, 1373294, 1690208, 2746588, 5493176, 10986352, 21972704]

約数ペア:

[(1, 21972704), (2, 10986352), (4, 5493176), (8, 2746588), (13, 1690208), (16, 1373294), (17, 1292512), (26, 845104), (32, 686647), (34, 646256), (52, 422552), (68, 323128), (104, 211276), (136, 161564), (169, 130016), (208, 105638), (221, 99424), (239, 91936), (272, 80782), (338, 65008), (416, 52819), (442, 49712), (478, 45968), (544, 40391), (676, 32504), (884, 24856), (956, 22984), (1352, 16252), (1768, 12428), (1912, 11492), (2704, 8126), (2873, 7648), (3107, 7072), (3536, 6214), (3824, 5746), (4063, 5408)]