21999904

素因数分解:

$2^5\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{1093}}^1$

素因数の和:1157

約数の個数: 48

約数和(自身を含む): 47142648

約数和(自身を除く): 25142744

約数列:

[1, 2, 4, 8, 16, 17, 32, 34, 37, 68, 74, 136, 148, 272, 296, 544, 592, 629, 1093, 1184, 1258, 2186, 2516, 4372, 5032, 8744, 10064, 17488, 18581, 20128, 34976, 37162, 40441, 74324, 80882, 148648, 161764, 297296, 323528, 594592, 647056, 687497, 1294112, 1374994, 2749988, 5499976, 10999952, 21999904]

約数ペア:

[(1, 21999904), (2, 10999952), (4, 5499976), (8, 2749988), (16, 1374994), (17, 1294112), (32, 687497), (34, 647056), (37, 594592), (68, 323528), (74, 297296), (136, 161764), (148, 148648), (272, 80882), (296, 74324), (544, 40441), (592, 37162), (629, 34976), (1093, 20128), (1184, 18581), (1258, 17488), (2186, 10064), (2516, 8744), (4372, 5032)]