261749168

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{67}}^1\times {\mathrm{71}}^1\times {\mathrm{181}}^1$

素因数の和:346

約数の個数: 80

約数和(自身を含む): 552464640

約数和(自身を除く): 290715472

約数列:

[1, 2, 4, 8, 16, 19, 38, 67, 71, 76, 134, 142, 152, 181, 268, 284, 304, 362, 536, 568, 724, 1072, 1136, 1273, 1349, 1448, 2546, 2698, 2896, 3439, 4757, 5092, 5396, 6878, 9514, 10184, 10792, 12127, 12851, 13756, 19028, 20368, 21584, 24254, 25702, 27512, 38056, 48508, 51404, 55024, 76112, 90383, 97016, 102808, 180766, 194032, 205616, 230413, 244169, 361532, 460826, 488338, 723064, 861017, 921652, 976676, 1446128, 1722034, 1843304, 1953352, 3444068, 3686608, 3906704, 6888136, 13776272, 16359323, 32718646, 65437292, 130874584, 261749168]

約数ペア:

[(1, 261749168), (2, 130874584), (4, 65437292), (8, 32718646), (16, 16359323), (19, 13776272), (38, 6888136), (67, 3906704), (71, 3686608), (76, 3444068), (134, 1953352), (142, 1843304), (152, 1722034), (181, 1446128), (268, 976676), (284, 921652), (304, 861017), (362, 723064), (536, 488338), (568, 460826), (724, 361532), (1072, 244169), (1136, 230413), (1273, 205616), (1349, 194032), (1448, 180766), (2546, 102808), (2698, 97016), (2896, 90383), (3439, 76112), (4757, 55024), (5092, 51404), (5396, 48508), (6878, 38056), (9514, 27512), (10184, 25702), (10792, 24254), (12127, 21584), (12851, 20368), (13756, 19028)]